Expensive Milwaukee M18 Battery with Bug Damage - Trying to FIX

[Music] hi there my name's vince from mymatevince.com and in this video we're doing something a little different i've never done one of these before do i think i'm going to be successful no but i think it will be interesting we're trying to fix this battery now if you were like me until i gained this little bit of knowledge i'd be like all right yeah battery what 30 pounds maybe 40 pounds guess how much this battery costs i was shocked 200 and sorry 260. i was going to say 230 260 uk pounds that is ridiculous i can't believe they cost that much but that's what they are so i'm expecting something pretty special on the inside here that is uh a serious amount of money for a battery now this was sent all the way from australia by robert from a company called tinsey's auto air and air is a place and this auto shop here is a place in queensland in australia i've been to queensland once in my life when i did my little tour of australia just after university had a great time two months absolutely loved it but only made it to the very bottom of queensland went to brisbane for i can't remember about a week or so had a great time but it says here he said that he had a battery for me and it says yes it's faulty i want to make sure it was faulty warranty got a knock back they suggested a bug attack interesting so obviously with a piece of equipment this expensive i don't know how long they're warrantied for but let's just say if it's like two years or three years or something then obviously you are going to send it back because they're so pricey but it was knocked back suggesting a bug attack so that's interesting and it said uh i've looked back in your videos could not see a battery pair wishing you well robert timms so thank you very much for robert that came all the way from australia so i know the postage on that wouldn't have been cheap i'm actually surprised that uh it was allowed to be sent i thought they had issues with sending you know lithium packs and stuff but it managed to make it here anyway right uh so i had to for the purpose of the video i haven't got any milwaukee stuff this is uh good quality stuff so i had to buy some for the purpose of the video so i've got a charger here and i didn't want to go and buy a drill because this is quality equipment it's going to cost a lot so what i bought is i bought this here a little work light if i can get it working then this would come in handy for me anyway even if i was just to use it as a torch a flashlight but look when i plug this in here this has already been taken apart it came with a little bag of screws but when i plug it in here it flashes red and green and that indicates a broken battery there you go and if i zoom in here you can see the little symbol can you see their broken battery so let's uh take it apart let's see this damage robert did send me pictures and it's certainly damaged let's see if it can be repaired let's see if we can get to the bottom of it if i can't fix it in this video maybe with the help of the viewers i might be able to fix it in a revisit video when i press this button here it should light up with how much charge is left in the battery and there's nothing happening there whatsoever so let's get our multimeter i can see here it says positive and negative we have one two three four five pins but positives this side and negatives this side okay that's not good so at this moment in time it looks like it's completely discharged 0.6 volts and this should be 18 is it it's an m18 but what volts is it yeah look 18 volts 216 watt hours that's massive right let's take it apart and see what's happening so here we have all the cells i can see an msun so i presume they're going to be samsung it's strange how they're all completely dead do you think they would have a bit of power left in them you know if the board had failed what unless there's a shorts why did wha they go 0.6 volts so we've got the voltage on that one battery there oh and that one but these are all oh yeah these are all in contact with each other here yeah okay i wonder is there a short on the board that's drained the batteries now the thing with these batteries is once they fall below a certain level they're not supposed to be that's like the safe level and they're not supposed to be charged again because they're going to be dangerous so uh yeah i actually think that this is unfixable but still let's see if we can find out what's going on because i remember from the pictures that there's bad burning up here and they reckon bug damage but obviously you see it's already been taken apart so if there was something in here it's going to have been cleaned away now but yeah check out the burning here it's very bad up here so should we get some ipa give it a good clean there and see what's going on is that is the corner of that chip faulty no maybe not unfortunately i haven't got another one to do any testing with uh and also i've got to be very careful using any sort of heat around here because we have a load of cells underneath it saying that they are discharged i think because there's no voltage there unless there's something that's you know draining it down but yet there is still charge in there i'm not too sure but i suppose it's safer to work on when it's been discharged but it's still going to be dangerous isn't it look at that capacitor has the capacitor just given up the ghost let's see if we can get a continuity uh test across it so now no it's not shorted wow that's not shorted what's caused this massive burn in here and this is coming from underneath and gone right the way up it's gonna be hard to work on because everything's uh like spot welded you see all here it's all spot welded rather than soldered on here's a fuse let's check the fuse maybe the fuse has just blown no i presume that's defuse it says they're f doesn't it i think we need to it's a hard ball to see again you know where the traces are i think we need to clean up here to see what's going on deep down here yeah before i do any scraping i'm going to get the ipa and clean that so i'm just cleaning with some isopropyl alcohol 99.9 percent all right okay now to me i thought there was going to be more components underneath the black but there's not that just looks like that c12 capacitor has completely blown why is it not shorting because if it had blown like open then it wouldn't cause a problem would it in fact what's that is that a component there there's a component there as well so it's definitely got a protective coating all over it so that's a resistor resistor resistor that must be them too is it oh yeah r19 is that resistor there to me it looks like and this has come from here the burning was all here wasn't it which is this side of that capacitor should we try to take the capacitor off when but go here now you think you'd yes it is shorting look it's a shorter capacitor oh wow what annoyingly the the cells have gone completely discharged i wonder could we get a charge back into them it's a shorted capacitor is that bug damage or has the capacitor just failed i would say the capacitors just fail but then again i'm not an expert at all you can put it down in the comments what you think right what i'm going to do is what i'm going to do here now i've got to be careful of using hot air but saying that i am a long way away from the battery cells and i've got this massive heatsink thing here to drain away all the heat from the board here so i don't think much heat's going to get to it but if i heat up here this black plastic is probably going to melt i wonder if i was just do you know what i'm going to do here now i know it would be much quicker just to use hot air i think because i'm dealing with lithium cells and a lot of them and very very powerful ones i think i'm going to use some low melt solder and i think i'm going to see if i can take that capacitor off using low melt solder uh the problem i've got is i don't know what to what to replace it with because i'm not i'm not going to know the uh the value i wonder would it just work without it possibly so this is what i'm going to use here chip quick smd8 so it's uh it's an alloy that reduces the temperature right down so let's say if it normally melts out i don't know if i had to have my iron at 350 then i might only have to have my iron up for example 200 once this is mixed in here to to lower the melting temperature off the existing solder on the board i rarely use it now i haven't said it in this video please don't copy what you see in these videos i'm not an expert whatsoever and i might well do things that are dangerous so just purely for uh watch it just purely for entertainment see if i can get that to melt in with that i'm going to be struggling here because it's all going to be going to ground isn't it yes it's coming it's coming look at it look at it look at it there we go so you see even now it's still liquid look amazing still liquid still liquid still liquid still liquid now gone hard right brilliant i'm going to use some solder wick and that hardly took anything i know it looks a lot because i'm zoomed in but although it's expensive it was still probably only a few pennies worth you see i've still got all that well let's clean it up and i've got some solder wick here to wick up the low melt solder so there we go now let's see which one of those ground which one of those pads is the ground it just looks messy because of all this coating that's put everywhere i can't see any other damage apart from that capacitor yeah that burning now is just left on that little kind of conformal coating stuff that's on here it actually looks perfect there's no that board hasn't been burnt through whatsoever so we're going to go to continuity and let's go to the negative of the battery which is uh negative of the battery is this one here let's see which one is the ground okay well it is 90 ohms to ground there and nothing there so beforehand the 90 ohms would be coming up onto here while now you're only getting on that one there so what i'm going to do is let's plug it back in and see if it does the same thing now or something different oh actually let me see what voltage we have now that the shorts removed i wonder whether they've upped themselves a little bit no they haven't no okay so it's still completely discharged [Music] he goes right let's see if it's still going to be flashing ah still flashing i was hoping it would do nothing as if it's not detecting the battery whatsoever that's a shame i wonder would i have to have a capacitor in that place there i wonder what would be a sensible one to put in 100 nano farad let's see what i've got okay so i've got my little ruler here and i can see it's a 1206 so let me just zoom in so if we have a look here you can see out of all of them that is too big for that one too small for that one and that one looks just right as if you were going to solder on there so it's a 1206 and i do have some nice little chinese kit off 1206 capacitors so now i just need to decide what i'm going to put in i found the 100 nano farad so if you look here now i've got my meter set to capacitance and if i go between here and here you can see there 100 nf there you go now why am i using this one i haven't got a clue it's just a round number uh this is where revisit video would come in useful because i really would not know i mean obviously if there was schematics you could just look at the schematics but there's not going to be schematics for something like this i haven't got another one to measure uh i would have thought it would have done something without even having the capacitor on board but maybe i don't know let's put it in and see what happens if i can always do a revisit video and then if everybody recommends that i put something else in there then i know it's just going to be a guess but it's going to be an educated guess while with me it is just a guess let's solder that in and also watch this so now you see if i go to continuity on the new one there is no continuity look at the r1 completely shorted yeah and let's get an ohm reading on that so i'm reading on the new one completely open the old one 0.3 of an ohm so yeah 100 that's a complete short well let's solder it back in i'm uh quite confident about doing this i don't need to worry about having any uh i'm just going to use normal leaded solder on this one now let's zoom in because i'm only using the solder 9 so it's only going to be very localized heat on here so i'm just going to use a tiny bit of flux and i'm just going to put it on one side well actually the flux can go on both sides i'm just going to put solder on one side then hopefully the capacitor will lie flat right now i can do this side let's plug it back into the charge i don't think that's gonna have made any difference at all and i think then i think we need to start putting some voltage into the cells to see whether that kickstarts anything i mean we've definitely found a fault on here it's just that if that's shorted did it take out other stuff as well i'm not sure i don't think this will have made any difference at all no so maybe if it recognizes that there's no power there whatsoever it's uh it just thinks it's a broken battery well i'm gonna get my bench power supply set up hopefully you can see that now so what what are we doing here this one here so that's the negative and positive you can see it's gone straight to a constant current but the voltage is definitely climbing i still feel safe right now because i know the cells are going to be able to have about 4.2 volts or something so i don't believe i'm going to be overcharging that one cell down there really this here is an ideal revisit video because there's going to be so many questions like how do i balance charge this when it's spot welded on what's a good guess about the capacitor have i put in something which has just got not enough capacitance in it 100 nano farad the voltage is nearly at the max now i wonder would it kick over to constant voltage when it gets to two volts let's just stay at that i'm still climbing what voltage does i have it set for oh 205 still constant current ah but look now there you go now we're constant voltage and the amps have died down ah okay let's see now what's happening here 1.96 maybe i wasn't going on them enough before maybe i wasn't uh stabbing them hard enough but yet there's nothing on these ones so does that mean the first bank has taken something i think it does doesn't it so now we can go on to the second bank can we not because look there's enough definitely nothing on that second bank i'm pressing hard but on the first bank here we now have nearly two volts across the board brilliant okay well i'm going to try to get the next bank up to 2 volts right it's been probably about 45 minutes later and i'm not really getting anywhere i mean i've got it up to 2.6 but that's all coming from this bank here so if i go between here and here you can see the two point that's you know 2.5 there's nothing happening onwards now i was getting confused about where to to put it you know because it's kind of parallel but also then in series so i wasn't sure where to charge it but luckily there's a video here that shows that it's by william bailey and it says milwaukee battery not charging and basically he goes across it just to show where uh you know where to to measure because that was that was confusing me he did say i think it took him two days to get them balanced and i think he was doing that two amps so maybe i'm doing it not not enough the problem is i've watched a couple of other videos as well and everybody seems to be starting at something around three volts on the batteries these batteries are empty i don't think i mean i already know that it's unsafe to charge batteries when they've been lithium batteries when they've been depleted below a certain level and i mean there's no arguing here there's no voltage in there's no voltage in this side over here so i mean it's not going to be safe is it even if i can get some charge into them and it's not going to be safe and i don't even think i can get charged into them because they're so depleted so what i think's happened is i think this capacitor has a short on we know it's got a short one i've shown you the short earlier so uh i think over the past months because i've had this at least i think two months i don't know how long robert had it before i mean obviously it was sent away under warranty all that takes time so i think that over the past few months the short there may be has just been draining the batteries completely because normally with lithium if you have a power bank and there's 50 charge and you go back to it months later there will still be charge in that but there's been something drawing on it the whole time so i think it's completely completely drained now that's what i think anyway because it was a fault it'd be different if you had like a charger on a power bank because the power bank itself won't let it go below that low level but we've had a short on the board here and i think that's been draining it so yeah that's it but anyway if you have a look here so uh yeah you start off here positive to here which i knew but i was getting confused after that it's so annoying because you really have to go down hard on here because they've got a coating on so you can see there 2.5 volts but now look if i swap the leads and do positive here negative here you can see that we have nothing yeah .02 of a volt and then we swap again from here to here again nothing 0.01 swap again i think it was from here to here nothing and lastly from here to here nothing yeah so uh yeah so if i'm going there to there then i can put my what am i on here at the moment so 2.5 volts and i've gone up to 500 oh no i've gone up to one amp i was at 500 milliamps so if i was to go for example [Music] here without shorting on anything else there and if i was to go here like so and turn it on you can see we go right away up to one amp but when i did this on the other cells it then starts to drop and i don't know whether i was dreaming but earlier on sometimes it would go it would do the constant current and then it will go to constant voltage with zero amps but i mean that's definitely that's definitely doing something now see maybe not all the cells are faulty maybe just some of them are anyway let's leave it there for a while let's give a shout out to the my mate vince massive well i'll tell you what let's uh let's go on to so we were red black red black red black should we try these ones here should we try this here let's see what that does because that one there look quite promising right that is right isn't it red black red black red black right let's see what that one does see now look why is that not doing anything there is it because i've got a bad contact here yes must be a bad contact okay that's really going for it right my mate vince massive ah kitdigital.com kip hakes max rokatansky having fun repairs ellensburg amplifier repair and service will michaelis chris seal felipe mr keebs.com king curd from low book auto sales dj vg tobias hennig and robert from timzy auto air the one who owns the battery so massive thanks guys for that and the continued support on patreon and everybody that supports these videos now this is looking definitely more promising well okay well leave it with me you can see what i'm going to do i sort of know which way to charge it now at least so i'll keep doing this and i think i'll do it at this i know we've gone quite high on the amps but i can't feel anything getting warm at all anyway still no lights up on the charge as you would expect let's see now whether or not the volts are climbing or dropping on here now see why is that dropping that's really confusing me if we've got voltage going into the battery pack which we don't understand why it's dropping there well i'll get back to it later on after i've given it another few hours right i've given up with the charging yes i know originally it had whatever it was naught point six and now we have actually got three volts on it 3.2 but it hasn't actually gone up since since hours ago but it is stable now at 3.2 but that's still a long way off 20 volts you know this is 18 volts but fully charged this is going to be up on 20 or a bit more uh what i didn't check is whether or not any of the cells themselves have shorted because maybe that's why my bench power supply it just doesn't seem to be acting right sometimes when i go on it i think oh this is great because it starts off at high current and then bit by bit the voltage will climb but then i go on other ones and the voltage will climb for a minute or two and then it will just drop and drop and drop and drop which is wrong the voltage should be climbing and climbing and climbing and the current should be dropping and dropping and dropping until it gets to a stage where the voltage is up to the maximum of that cell and then the current will drop off so uh it just doesn't seem to be doing what i think it should be doing so let's see whether or not we actually have any shorts all right so we've got short there i wonder if we got shorts over here ah no we haven't okay maybe this might be the problem maybe there's a a cell that's shorted that's knocking it out i didn't think to check that earlier all right so we have a short there so does that mean all of this is going to be shorted now how do i find out which one is shorted or is it just the way it's been wired up ah that's oh yes it is so all of these are going to be shorted now aren't they and that's the ah now hold on that's the reason probably why they're all measuring no voltage yeah okay i don't need to go across everyone yeah they're all shorted now is that coming from the cells or is that coming from something on the board here how do i disconnect this board i've got some solder joints here here here and here maybe if i underwater them i can price this up and then that will tell us whether it's the board that's putting a short on or whether it's the cells so this is where destruction mode takes over so i undo the solder contacts on the board and that does allow me to price the board up a little bit the ends contacts are still welded on but the middle contacts are now loose so that means now the board is disconnected from certain banks of batteries which is good annoyingly though the shorts are still on the batteries so to me it looks like the fault is with the batteries rather than the board because up until that point maybe the board could have shorted which is then going to throw a short everywhere but by disconnecting the board we've now proved that the short is on the batteries so these batteries are spot welded on so there's no easy way to actually dismantle them to check them out apart from doing something very destructive and also very final as well because this will not be going back together but i kind of knew at the beginning it wasn't going to be fixable because the cells are so so so low uh so what you're witnessing now through this fast forward a bit is me basically prying off every single spot welded bit of metal onto the batteries so i can take all the cells out and so we can test them each to see where which ones are the faulty cells i'll punch into google the information here the inr217004t and yeah lots of information out there i've just pulled this one up here capacity 4000 milliamp hours rated voltage 3.6 to 3.7 volts charging termination voltage of 4.2 max discharge 35 amps do not discharge deeper than 3.5 volts well we know that these are zero yeah so uh and it's without protection circuit because some of them have built-in circuitry don't they in the top of them but these ones haven't so uh yeah i mean really these are scrap aren't they well you know they need to be recycled but i just want to play around with them for a bit just to see if we can get any of them livened up right i have been a busy busy bee so these batteries here the reason i'm having problems here is because out of all these cells there's 15 cells here out of all of them there's only actually three which are behaving themselves and they're the three that were left in here that were measuring the 3.2 volts or whatever it was and and funnily enough at the very very beginning when i did my testing this bank here were the ones measuring 0.6 volts everything else was measuring zero volts now as far as i can see all of them have a short on apart from the three that are behaving themselves and that's the reason they're not charging properly so right now i've pulled out one of the good ones i've got it here i've got it on my bench power supply and it's going up exactly as you would expect it to so if i was to go here and here i can see that at this moment in time it's 3.4 volts now just watch it for a little bit that will go up i know it was 58 a second ago obviously when it's jumping up sometimes it jumps down a little bit but give that another couple of minutes and that will go to 58 and then another couple of minutes after that it will go to 3.4 59 so let me just fast forward through this part of the video i've got my bench power supply on here at the moment there you go 59 yeah so that's behaving itself this one and this one will also behave itself whether they're going to work long term or not don't know because remember it's dropped right the way down to 0.6 volts but maybe get lucky with them or possibly after three or four recharges maybe they might go on fire because they've gone below their safe level but check this out if i was to go to just ohms if i go on to the negative side here and the positive side here and this is the same as when i take the battery out on this one here so it doesn't make a difference that they're joined here if i go here and here you can see that it doesn't give me a reading and i'm stabbing down on that battery pretty hard there's no reading there whatsoever if i swap the leads and do it this way then it does give me a reading it gives me a reading of zeros yeah but this way you can see that this one and the one below does not give me any reading at all and remember these are the ones that are behaving themselves yeah i'm on the one below now yeah but now watch if i go on to any of the faulty ones if i go the wrong way it will give me that zero reading there you go and if i go the correct way every one of these have shorted so i'll be getting something between two ohms and i think like i don't know what i don't know what the maximum was yeah that one's doing pretty good actually some of them are like two ohms or three ohms six ohms there you go see that's down at two ohms yeah so that's not right is it so the uh chemical makeup on the inside of these have obviously shorted its form bonds or whatever and it's shortened across and that's the reason no matter what i did because i spent half a day yesterday trying to charge these up i'm not going to be able to charge them up because they're shorted internally so some people say you can put them in the freezer and that can work other people say you can give them more whack and that can break behind the inside but they're gone aren't they they're gone maybe i might be able to revive them a bit but they're never gonna be safe and they're never gonna work well so what i've done is i've ordered up 15 new ones 15 that's how many is in this one here i've got it from a place called fog star in the uk apparently they have very good reviews price was roughly eight or nine pound per battery but then i got a discount code to knock 20 off i think in total i paid about 115 or 117 pound including the postage and hopefully they will arrive tomorrow so what i'm going to try to do is i'm thinking long term it probably would be useful to have some of these in the house anyway because other products i come across in the future i presume will be going over to these bigger type of batteries i think these are more for rechargeable cars and also e-bikes and stuff like that so there we have it i will see you in a couple of days when i've got the new batteries well that's the next morning now on fair play to fog start everything arrived which is uh really really good well let's uh see what we're doing as far as voltage is concerned because really i want these to be all the same going into here otherwise the drill's going to have problem again they have to be balanced don't they right 3.4 3.45 yeah so they're exactly the same well let's just open up some more i might be lucky here if they're all the same 3.45 so they're exactly the same so that's great so hopefully the rest are as well so i need to now put them all back in and try to budge this up try to bend it all back into place and stuff and then i've got a big tip on the soldering iron i need to just apply a little bit of heat now obviously it's very dangerous you shouldn't be applying heat to these that's why they spot welded in the first place but what i'm hoping is if i'm just quick on each of them then i'm thinking hopefully i will get away with it now interestingly enough these three i fully charged up yesterday and look last night they were still holding their charge so this is all the negative sides watch this i've got them all the way up to four volts there you go four volts and holding you see look at that so although these ones here were massively discharged they look to be behaving themselves right now [Music] we go and you can see not dropping yeah so really strange how these three are fine and yet everything else is gone it's kind of weird i wonder in another few weeks would these have completely discharged as well bit of a shame what i'm doing is i'm just straightening these up using the pliers because obviously when i took them off the spot weld they got all bent and now i'm bending them in so eventually when we do get the battery in so these ones here are going to be on the positive so when we do get the battery and it will give me an opportunity now to solder that onto there but even without the solder they're still going to be making a little bit of contact just purely from the pressure off the uh the fact that they're folded in it's gonna take a long time now i'll just show you this bit just in case it explodes if i get on camera now uh what i'm gonna do is this stuff here has coating on the back this kind of like plastic coating so it's going to be a bit annoying solder through that so and also i don't want to apply too much heat to it because obviously what i'm doing now is very very dangerous do not copy what you see in this video these are spot welded for a reason i don't want the solder line to travel order the heat to travel all the way through because they could burst into flames saying that i've got a very big tip of my iron i'm at 480 degrees celsius i'm only holding on there for a few seconds that's why i'm doing this i wouldn't do this if i did believe that it was going to explode in my face but it could happen so i'm going to be putting a blob of solder on each of these and then i'm going to be putting a blob of solder underneath each of these then hopefully when i heat it up from here the solder is already in place it can just marry up now just to show you what i'm doing so i've got my tip here and applying it now and flooding it with solder really really quickly flooding up the solder there we go yeah so you can see now i'm not holding on there for a ridiculous amount of time so i just need to do that across all of them it's going to be harder on these ones there you go right you get the idea now we're going to be applying the solder underneath here this one should be easier because i'm thinking this side here has no coating on it yes that's flown on there lovely all right here goes slightly nervous so let's get it all in the right position there there right okay let's uh start with this one here right um hopefully i can force that down here all right let's go now hopefully this won't need a huge amount of heat now i wonder what that have done or is that just not enough heat they're on right so that's what i'm going to be doing on each of them let's just try the positive one over here and down [Music] okay well it's not it's not hot i think that's going to be okay it's definitely going to be okay for testing anyway and uh you know for what if it works for what i'm going to use it for so they are all soldered up now yes i know it looks a mess it doesn't help before this uh coating on here makes it look even messier so now what i need to do is i need to solder on all these little points that stick up from here back onto the board then i think we can press the button and see if we have anything just need to push them through to begin with [Music] right okay i think we're done if it works i can put a hot glue gun all on these bits here just to give them a little bit of extra extra strength here goes oh no there's no lights right let's see maybe my soldering is not good enough i was expecting to see lights let's see what we got here now give me something yes 17.2 why hasn't it given me light so is the board still faulty should we see if we got balance 3.42 three point sorry three point one second sorry 3.45 3.45 3.45 3.45 3.45 so i think the cells themselves are balanced right let's uh see what happens when we plug it into the charger maybe it needs to be reset or something by going into the channel i've got to fit in we're going to have the same lights let's see ah come on you know what i'm thinking now i should have paid the extra and got a working one and then i could have used the batteries from that and then i could have find it the board as it is now i've spent like 115 pounds or something on batteries when if i put another 45 pound towards it i would have got a working battery because i have seen them for sale for 160. it's weird when i first of all got this and i looked up i'm sure the prices were 260 across the board but then when i was editing i'll look back and uh they're not you can get them for 160. all right well leave it with me 17 volts isn't too low is it so it's obviously a problem with the board what a shame i've put so much work into this it's still not doing anything ah gutted really i'm gutted well i've got my bench power supply on it again i've got it set to 19 volts at just one amp and i'm just going to leave it on there for a while okay it's been charging up about 15 minutes now it's 17.6 volts here i've upped it to 2 amps i can feel a slight bit of warmth in here now so i really want to keep an eye on this it would be a lot safer safer to do a lower amps it's just that on the lower amps it was going up so slow even now you can see that it's going to be a long time before we get to 18 or more volts anyway it does appear to be charging balance so i've just gone across the extremes here so you know from that side of the battery pack all the way to that side but look here now if i get my meter and if i go across here you can see that it's all charging the same amount so we're 3.53 3.53 i can't be able to swap the leads around it's the same whether it's negative or positive 3.53 3.53 and 3.53 so you can see that it does seem to be charging in a balanced way which is nice it's not one cell that stays not like this bank of cells which has taken everything it seems to be spread out across the whole thing so uh now i know it's a failure video but this is what i'm thinking on the two outer ones here we have 17.7 volts now yeah so hopefully i'll get it up to 18 in which case then do you think i can put it back together yes this light here won't be working yes i won't be able to charge it unless i charge it with my bench power supply like this but do you think that my little work light would work or do you think that there's a chip in here which communicates with here and will only provide the power when the chips communicate and agree which would be annoying if this is just looking for 18 volts then i think this battery will work because look the board itself is faulty but the cells are good aren't they because they're brand new so in theory if i charge this up to like 19 volts or something then this would probably last for years the amount i'm going to use this it will probably last for years in which case then it's still got a purpose yes it will be the most expensive torch slash of flashlight in the world but i don't care i will take that success because the amount of time i've put into this i will take any little bit of positivity that i can out of it but uh yeah actually do you know what is climbing at a good rate now i probably could lower down the amps but i know i think i'll leave it and if it starts getting warmer then i'll lower down the amps but i'm happy with the temperature at the moment it's not even it's not even like lukewarm it's just not cold it's a bit warmer than room temperature okay so yeah i'll see you in a bit well it's still charging but beforehand i was going straight on to the battery contacts here and i'm thinking if i'm going to be using this myself then it's going to be annoying to have to keep taking it apart but look i can charge it via the actual contacts here so obviously it'd only be safe to do this with a bench power supply if you have a look now you can see there that it is charging via there you can see it's drawing two amps via the actual outer two contacts now i believe when it comes to the actual charger here it's not using the attitude contact i can see a middle one in here it says if i look closely on the board this one says battery positive this one says battery negative the middle one says charge so obviously it must be charging on this one and this one when i put my red lead to here it just goes to constant voltage it's not drawing any current so obviously i can't charge it here but i can charge it here and it is charging because if i get my uh multimeter here and if i go scrape between here and here to make a contact you can see there 17.902 now it's gone to three in a minute four in another 30 seconds or so it will go to five so you can see it is actually moving up there so if this does work with the work clamp and i can't see why it wouldn't surely they're not going to put like a battery mono monitor system in a work light then i think that this will be perfectly functional for what i need so what i've done is i've put a load of glue gun in there bits here so i just use my hot glue stick with the hot air and i just melted it all into there so yeah it still fits in here nicely so i am actually feeling upbeat now i know that's pure desperation but i am feeling upbeat that i think this is going to work so i'm going to charge it up to probably about 19.5 volts and then we'll uh we'll see we'll see what happens with it okay it's half the day later again and i charge this all the way up to 19 point something volts and it's holding if you have a look here now you will see that once it settles down it will stay at a particular reading and stay there so obviously the new cells in there are working fine they must be all soldered correctly i think because it seems to be correct there you go so it's holding there so as far as the battery side of things is concerned the cells and stuff are going to be working just fine the problem is we can't do anything with the board for example if i press this button nothing lights up here i can't charge it just like you've seen earlier because we haven't got the board doing anything the board's doing nothing so well i presume that side of it's not going to be working so in theory we could keep using it until we drop it below the safe level again so that's why it's not going to be safe to use but for something like this work like here it is working which obviously it's going to work isn't it because it's got 19 volts coming out of it here i was just a bit concerned thinking there might be circuitry in here that needs to talk to the battery but it's not it's just obviously looking for the 18 volts and it will keep working so uh i think that this will last for absolutely ages for someone like myself look at this it's even got a little thing here so you can hang it off so i think that's going to be quite useful obviously is complete overkill to have such a powerful battery on something like this but at least it's got its use yeah that is it for this video massive thanks to robert for sending it out to me apologies that i couldn't give you a proper answer in my opinion i don't think it's bug damage but like i said earlier you put it down in the comments what you think caused it i think the capacitor just went 40 because sometimes that's what they do but uh yeah there we go so that is it if you did get any enjoyment from it at all please give it a thumbs up and i will see you very soon for another trying to fix video take care everyone [Music] [Music] you

Channel: My Mate VINCE

Views: 90,881

Keywords: faulty milwaukee battery, broken M18 Milwaukee 12.0, milwaukee battery m18 12 Ah not working, trying to fix a milwaukee drill battery, fixing a M18 Milwaukee battery, repairing a High Output Milwaukee M18 battery, revive M18 Milwaukee battery, how to fix a milwaukee M18 battery, attempting to repair a milwaukee battery, Milwaukee tools, Milwaukee M18 12.0Ah battery

Id: JzJOrJUqXpI

Length: 56min 41sec (3401 seconds)

Published: Wed Nov 24 2021