ORIGINAL: bruce88123
If bigger than @ 2000 Mah I'd recommend a better charger also. IF you go to 5 cells (6 volts) you MUST get a new charger, no option.
Incorrect...
I charge most of my 6v 2000-3800mAh packs using a stock wall wart supplied with my JR radios, since I have so darned many of them.
I've never had any problems in spite of the fact that I'm demanding a lot from those batteries with 8-9 servos or more on the planes.