ClintonRC

i have a sweet charger (dynamite passport ultra) and it can charge 12 cells at a time. this being said, can i plug two 6 cell nimh batteries into a series connector and charge them at the mAh rating on tha battery (or lower) with successful results?

crusey_aus

iTrader: (3)

Can be done but not a good idea

Unless the cells are very closely matched you may run into problems

Cheers

ClintonRC

cool thanks for the tips.
so two brand new batteries should be ok, assuming the batteries are in perfect condition and are at the same discharge point, or reasonably close to it.

JR007

Thats right. The charger does not recognise cells apart, so if they have different capacities, discharge rates etc, when you charge them, they wil basically charge as well as the worst cell.
If you have an equalizer and they come out close, then go for it, otherwise i'd leave it as it will only degrade the batteries faster.

ClintonRC

im using a passport ultra, but as for NiMH batteries there is no balancing plug like a LiPo.
but i am using two NiMH batteries of the same brand, bought at the same time and never run separately from eachother. if all else fails i still have a pair of prophet II chargers i can use to charge these batteries, i just dont get the same run time. Passport Ultra > Prophet II *x2