My New Mi boxer OVERCHARGED my New P45B to 4.34V. I checked three times with my DMM to make sure it was correct. I’ve never seen my Chargers charge that high the highest I remember is 4.24 volts. Should I recycle the battery? Is it totally unsafe to charge and use again? I don’t have the print out but I read that it can cause plating and make the battery unstable and even possible venting.
I need to keep an eye on that slot to see if it does it again. I only have had the charger a week.
Thx.
I forgot to mention. This supposedly revised version is supposed to stop charging as soon as it reaches 4.2, regardless if you leave it on the charger or not. Apparently it failed in this situation.
Nah. Just deflate it a bit by running it a few min at high, turbo, whatever.
Capacity might suffer a but, but a cap test would indicate if that’s so, and how much.
Just don’t let it overcharge again.
Oh, and dump the charger. That should be recycled, not the cell.
Some batteries are 4.35v not 4.2v.
P45B is a 4.2V cell. There are very few 4.35V 18650/21700 cells on the market.
Lightbringer nailed it! 
Okay thanks everybody.
I was just concerned probably 15 to 20 minutes I was waiting for the charge to terminate cuz the other one was the same voltage and was done. I thought that 15 or 20 minutes could have damaged it a lot more. 4.34 shocked me. P45B is a 4.2 volt battery so the 4.35V is irrelevant. Unless if it thought it was a LifPo. I can’t even recall if it could charge those kind of batteries I think it can but it won’t go up to 4.35 or at least it shouldn’t!
Amazon is great and I am returning both of them today and going back to the Vapcell S4 Plus at least they were safe.
Again, supposedly mi boxer fixed this termination /overcharging glitch with this newer version.
Apparently It just kept charging and I’m not taking Chances with the other charger I returned both of them.
Finally this is a good example and reason why I’m a fanatic about voltages. I check them after use, when they come out of the charger and before I put them back in the light. If I didn’t do that I would have never known about this extremely high voltage.
Doing a capacity test to see if it affected the battery in that regard.
That’s exactly what I did I put it in my Astrolux FT02S for about 15 seconds. Turn it off and was at 4.20 volts LOL
My SP36 BLF 2700k with Anduril 1 also overcharged the 18650 Cells with 4,26-4,27 V, so far i didn’t had problems because of this, but i don’t use this flashlight that often…