Neurotex,

if your current charger charges at a 145mah rate or lower, it would work for the cell. any higher and you're past the 1C max. the AA does it at 2C, but it "cheats" in a way, to let it charge faster without over charging the cell (probably why yours, and a lot of others lipos have gone bad so quickly). the AA charger could charge the 140 cell too, it would just take a few more minutes. you can get a decent lipo charger for a pretty good price these days. i've been using an Apache 20/20 smart charger for over a year now, for any cell between 110mah and 1200mah, 1 to 3 cells, for less than 30 bucks (same site that i linked to in the earlier post). the Apache 20/30 will do 1-8 cell NiCD/NiMH cells too.

jmir,
is it the Estes flying wing, the QuickFire (the one without the motor)? if so, its not worth the 30 bucks. it has to be very calm outside, and you need a lot of room. i only got it to fly successfully once out of 4 tries before the launcher tangled itself into the biggest knot you've ever seen. but, now i have a decent flying wing platform that could convert to RC pretty well.

nick