Thank Buzz. That's just the kind of info I was looking for. I'm going to try the Nimh since the Parkzone Mustang they came out of is 'resting in pieces'. I doubt the esc was set up for LiPo. This plane is old. I've been out of the hobby for 10 years and it's probably 5 or 6 years older than that. I figured this old thing would be good to warm up the thumbs.