I agree the A123s are robust and cost per flight is attractive, however, when you have to push an 11 lb pattern plane to 12 lb just to get longer lasting batteries, it kinda defeats the purpose. With a limit of 11 lb for any serious competition, you don't see any A123s being used.

Having said that, if you don't care about the extra pound, go for it. Maybe someone will figure a way to make our 2M planes a pound lighter and then they would be great.

Woodie

BTW, the Hyperion batteries (25C) are $160 a stick or $320 a pack, not $380. And the new G3 technology seems to be lasting quite a bit longer than previous generation batteries. Don't know how long they will last yet. My sets have about 75 cycles on them and the IR has not changed at all. Hope it stays that way.