Burt,

I just got them yesterday, they're shapped like two mini-eXtreme 10s packs. These are so different in shape than any other batteries I've used so I need to figure out how to strap them together to fit both planes I have. My planes are currently setup for the eXtreme 10s packs and the older Prolite 5300's (strapped together side-by-side).

I'm anxious to give them a try!

Keith