Originally Posted by
trilerian
Higher mAh will give a lower IR. So yes bigger 2S1P packs will have a lower IR due to the mAh increase. But 2 packs in parallel effectively halve the IR.
From the testing I have done, 2S2P packs from the same manufacturer and same overall capacity, when compared to a 2S1P pack, the 2S2P packs will have lower IR.
Now I am not saying you can't get 2S1P packs that have lower IR, but those will cost more. When comparing the same quality cells, 2S2P packs will have lower IR.
As far as longevity, I buy new batteries every season, so I don't really test for longevity.
Interesting you've seen a lower IR with a higher mah, every pack I've tested has been the opposite. This is cycling them on a GFX at 20 amps charge with a 35 amp discharge.