AA's vs Sub-C's ?

[BrianG]

I was really looking at a solution to replace a set of GP3300 cells with greater capacity, or equal capacity for the same weight and/or real estate. GP1100's, even in parallel, wouldn't give me that. They may have a high energy density, but the capacity isn't there.

The AA cells I was looking at were 2300mAh, so I figured two in parallel would give me 4600mAh. But, as my test displayed, they seem to have higher internal resistance so they aren't good for high discharge rates. They might be an ideal alternative to GP3300's if I needed a lower discharge rate (like in a 1/18 scale R/C) since there is more capacity (ie: longer runtimes) overall.

I would be able to get the high discharge rates if I were to parallel three or four AA cells and get a really nice runtime, but weight and real-estate would be much higher.