Found this cute little guy. Battery bms seems to either be dead or cell voltage too low. Has anyone in the Linux community revived a BMS before or recharged from zero?
Did you Hackintoshed it? Because it looks like it’s booting MacOS.
My dad did in 2011. Wikipedia says this is a popular model to Hackintosh.
michael MJD, is that you?
This model appears to be 15 years old. The battery is just dead and won’t hold a charge at this point I’d imagine. No replacement out there is going to be worth the risk in buying. At least it still works when plugged in I guess?
I see mint overflowing… so mint it is.
I’ve got news for you, that’s slime not mint.
i have dissasembled batteries to recharge the 81650 cells inside then reassemble. If they drop below a certain threshhold then the protection circuit won’t charge them. I have a special charger/tester for lithium cells and a battery tab welder. It’s only worth it if the replacement is unavailable and it’s for something very rare.
The annoying thing is, a lot of modern battery protection circuits will brick themselves once they read a too low battery voltage. So not only will they not charge anymore, they will never charge, even with new cells. It’s so dumb and meant to prevent 3rd party refurbished battery packs.
There’s a trick I learned for drone lipo batteries where if you have low cell voltage, you can set your charger up to charge a different battery chemistry, I think NiMH but don’t quote me on that, charge it for a little bit and then switch it back to lipo mode. No idea if it would work here.
Nice trick but there’s a reason the charger is designed to not do what you’re getting it to do. Preventing explosions and such. I’d recommend looking up why/how the chemistries are different at low voltage so you can ride the line more safely
Absolutely. I’ve only done it once or twice, just long enough to get the one low cell voltage high enough to switch back to lipo mode. Also, all the lipo charging I do is inside of a steel ammo can. My drone buddy teases me about it but I don’t care, big and/or lipo batteries are fucking scary.
The ammo can is a solid idea, wish I thought of that myself. That would raise the safety factor enough for me to give it a try once or twice as well. Still, covered outdoors area or similar. Agreed on having a healthy fear/respect for big cells, it’s wild how much power we can fit in a battery these days and even more so to watch it escape.
If you try the ammo can idea make sure you poke a hole in it otherwise you run the risk of it becoming a bit of a pressure vessel.
