Test/review of Keeppower 18650 3200mAh P1832U (Blue-white) 2020

[HKJ]

@question465

The M21B doesn’t have a low voltage protection, it just starts to blink when the voltage gets too low. I have a question concerning safety issues here. Let’s imagine I would not turn off the flashlight when the low voltage warning starts to blink: is there no problem because the Keeppower battery is protected against over discharge? Would the flashlight just turn off when the battery’s safety will kick in? And what will happen next? Is it safe to charge the battery again and keep using it even after the over discharge protection has been activated?

Any LiIon battery with build in protection cannot be over discharged in any serious degree and it will be safe to recharge the battery.

@question465

And finally, here is just another question: a couple of days ago I forgot that I was charging the Keeppower battery via it’s USB-port. Probably it was connected to the charger for about 3 hours after charging has been completed. When I cut off the power plug of the charger, the Keeppower’s blue “charging complete” lamp was still on. Is this a sign of a probable overcharge, despite the battery has a protection against over charging?

That was probably due to the capacitors in the charger and had nothing to do with the battery.