RE: NiMh
Curiosity got the best of me on the weights
Digging through my batteries, here is what I found.
Futaba 4.8V Batteries
500 MAH square pack = 92.7 gms (White Cover)
500 MAH Flat Pack = 95.7 gms (Grey Cover)
600 MAH Flat Pack = 88.5 gms (Red Cover)
1000 MAH Flat Pack = 118.3 gms (Yellow Cover)
Ebay 2500 MAH NIMH Flat Pack = 122.5 gms
Note: I had replaced the lead on the 1000mah pack, so the weight may be a little different than a stock battery
Don