Actual protip: occasionally, lithium ion batteries appear to completely fail. Sometimes that's not because they've failed, but just because they dropped below a certain arbitrary voltage level and the controller isn't allowing the cells to charge. In this case, you can apply the correct voltage at a very low current to raise the voltage above that threshold and like magic the battery comes back to life.
Happened to me 2 times this week. First with a drill battery, second with the battery out of a rugged Samsung tablet. Both were perfectly fine and normal once I returned the cells to their minimum voltage.
Now, be careful: it's important to limit current and voltage because if there's something wrong you don't want your cell to blow up in your hands!
Happened to me 2 times this week. First with a drill battery, second with the battery out of a rugged Samsung tablet. Both were perfectly fine and normal once I returned the cells to their minimum voltage.
Now, be careful: it's important to limit current and voltage because if there's something wrong you don't want your cell to blow up in your hands!
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Yeah, and you need to track temperature as well.
Most likely it'll be fine, but it's better to be safe than sorry when dealing with chemical batteries.
Most likely it'll be fine, but it's better to be safe than sorry when dealing with chemical batteries.