Hi!
I have tested the Keeppower 18650 3200mAh P1832U (Blue-white) 2020 in a Convoy M21B (XHP 50.2, 5A maximum output).
On high mode, the battery lasts for about 1 hour and 45 minutes, on turbo it lasts for about 35 minutes.
Here is a review that covers the SST-40 LED version of the M21B: Convoy M21B Flashlight Review - ZeroAir Reviews
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?
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?
Thank you!