I think it is quite normal that AAA NiMH get warm at 0.5A.
I just made myself a mod with 50/100 mA charge current for charging some incoming 10180. I have no intention of using that unit for charging NiMH. Let's see what HKJ finds out about the NiMH charging method and we can act accordingly.
Yes, that will also do it, but it takes two solder irons and a lot of skill to unsolder R6 and get it fast away from the tip of either iron in healthy state (and find it afterwards ). But at least the board has a better support by this procedure.
I tried to charge a half full Eneloop XX, size AAA with 200mA in a unit modded for 200/400 mA. Happy to see that the charging stopped. Max voltage was 1.559V and cell voltage right after was 1.45V. The cell did not get warm.
+ 1. This was my point in asking if the 4.25v was the voltage taken during the Charging process, not after from the cell’s voltage after taken off the charger after “Done”.
That is a misunderstanding! The correct, recommended charger voltage is 4.20V and the battery normally is 4.15-4.19V right after charging. I'm sure that HKJ will support me in that
That is correct, but most LiIon batteries has a +/-0.05 volt tolerance on charging voltage, this means 4.25 volt charge voltage is acceptable.
I just had a very cheap charger charge to above 4.4 volt (the battery did survive). This type of chargers makes me think about adding a computer controlled mains switch to my charger test to automatic stop when the voltage gets too high.
After that nasty surprise I have started testing the Lii-100, but I expect the review will be mostly a copy of my Skilhunt M1 review.