ORIGINAL: GaryHarris
For a .40 to .60 size, non 3D plane with standard servos, there is no reason to go to a larger capacity RX pack than a 600-750mAh nicad if you have a good charger and cycle your packs regularly. Buying a high cap pack and using a wallwart to charge it gains you nada.
Edit: Besides weight.
What he said...if you think your gonna fly all day long,, get 2 or 3 800mAh batteries and buy a foot of velcro so you can change them out in 5 minutes if needed...most guys at our field get in 3-5 flights and call it a day, many a time I have gone out to the field and flown 1 plane 1 time or 2 planes once or twice each......Rog