This problem seems to be very common with the M12 6.0 ah batteries (and the 2nd/middle cell to be exact)... 2 questions: #1 Why do you start at 0.5 amps for the recharge, and not 1.0 - 2.0 amps ? and question #2, if I have a couple of M12 batteries, all BNIB, should I open them all and charge them up? Or leave them as is? I'm not planning on using them any time soon, but I want to make sure they don't die or have permanent damage from remaining unused and in the package... Let me know ALSO... (last question lol) how long did you have that stubborn cell charging/boosting on the power supply?
Great questions. I like to start charging slowly so I can make sure nothing is getting hot. I'd say the entire process took about an hour or so. It seems the main thing is battery management. Milwaukee does not seem unique in this either. It does not seem like the tool batteries balance charge all that well. This is generally okay, but as the battery packs age, I believe this will happen more frequently.
@@TalkingHandsToolsmost of them are using 30Q v3 like yours till around dec 2021, they switched to Sony / Murata VTC 6 - best cells then in 2023, they switched back to 30Q version 6, so far i haven’t seen any bad one yet, i like Murata, very strong and consistancy cuz these M12 does not have balance board, even M18 board doesn’t balance cells and you can tell when you fully charge a pack and measure them to see if they keep themself balance
@TranTek I have seen none of these packs seem to balance. When I repair batteries, I've been matching the cells inside. My thinking is that the cells all have different capacities and characteristics. I obviously can't find an equivalent cell with the same amount of run time and charge cycles, but matching types of cells does match cell charging and discharging characteristics. In your experience, does any of that matter? To be fair I don't replace many cells I normally have to balance charge them and I can normally get the pack working again. I do have a M18 12AH that has some issues that will likely end in cell replacement if I can troubleshoot it and identify the problem cells.
@@TalkingHandsTools if you run across well made cells they don’t sag like that, i seen many bad one and good one like Sony VTC 6 18650 to VTC6a 21700 cells that still very well balance even those Samsung 30T and Samsung 25S LG are very good too Samsung made some of the crappy one over the years and also some very good one
This problem seems to be very common with the M12 6.0 ah batteries (and the 2nd/middle cell to be exact)... 2 questions: #1 Why do you start at 0.5 amps for the recharge, and not 1.0 - 2.0 amps ? and question #2, if I have a couple of M12 batteries, all BNIB, should I open them all and charge them up? Or leave them as is? I'm not planning on using them any time soon, but I want to make sure they don't die or have permanent damage from remaining unused and in the package... Let me know
ALSO... (last question lol) how long did you have that stubborn cell charging/boosting on the power supply?
Great questions. I like to start charging slowly so I can make sure nothing is getting hot. I'd say the entire process took about an hour or so.
It seems the main thing is battery management. Milwaukee does not seem unique in this either. It does not seem like the tool batteries balance charge all that well. This is generally okay, but as the battery packs age, I believe this will happen more frequently.
What screw bit did you use?
I'm pretty sure it was a security torx, I think it may have been a T10. I'm going completely from memory, though.
Link to replacement case?
The listing I bought from isn't active. Search for M12 replacement shell, that should get you close. I see quite a few options to choose from.
those version 3 of 30Q cells are notorious bad and fail
same cells were in M18 9Ah they stop making them.
they switched to a 30Q version 6
I didn't realize there was multiple versions. How can you tell the difference?
@@TalkingHandsToolsmost of them are using 30Q v3 like yours till around dec 2021, they switched to Sony / Murata VTC 6 - best cells
then in 2023, they switched back to 30Q version 6, so far i haven’t seen any bad one yet, i like Murata, very strong and consistancy cuz these M12 does not have balance board, even M18 board doesn’t balance cells and you can tell when you fully charge a pack and measure them to see if they keep themself balance
@TranTek I have seen none of these packs seem to balance. When I repair batteries, I've been matching the cells inside. My thinking is that the cells all have different capacities and characteristics. I obviously can't find an equivalent cell with the same amount of run time and charge cycles, but matching types of cells does match cell charging and discharging characteristics. In your experience, does any of that matter? To be fair I don't replace many cells I normally have to balance charge them and I can normally get the pack working again. I do have a M18 12AH that has some issues that will likely end in cell replacement if I can troubleshoot it and identify the problem cells.
@@TalkingHandsTools if you run across well made cells
they don’t sag like that, i seen many bad one and good one like Sony VTC 6 18650 to VTC6a 21700 cells that still very well balance
even those Samsung 30T and Samsung 25S
LG are very good too
Samsung made some of the crappy one over the years and also some very good one
Probably the battery in mine, two years old hardly used and both are bad!