I happened to come upon this thread.
I had a Nitecore, I forget the one, with 4 slots which I gave to a friend.
I have been thining about getting back into RC and do not want to purchase both a charger for cylindrical cells and RC batteires…especially since I think I may get a DJI which has its own system.
Anyway, I built two different battery holders capable of holding quite a few cells of various sizes….one is in parallel for charging and the other is in series. The later one I am using to test how batteries lag with my laser drivers.
The former one, I simply put either one or groups of the same batteries in, set my CC CV PSU for 4.2 and set the proper charge current for the specific capacity….and wait. Usually, I charge when the voltage is high enough that it is in CV mode. I wait until the current drops to zero and voila….4.2 volts….Yes….if the batteires are not equal in terms of capacity at time of charging…not good. Since I started this….I have not had problems….
except that my new Samsung 30Qs seem to take quite awhile to charge at 1/2 to 1 C
The one thing that I do need is a simple way to discharge my batteries for storage and if possible, measure capacity. I was thinking of buying a SkyRC hobby charger….but I really don’t need it.
I have yet to find an inexpensive way to discharge and measure capacity…any ideas?
Thanks