I've tried the Novak smart tray with some of my sports packs. It did not turn well. No matter what way I put the battery in the tray smock or sparks would appear. Since then, I do not use it. It freacks me out.

I can do the change to Lipo if I want to. Only one thing. I don't trust them. I donnot want to burn my house down. They don't seem to reassuring.

Nimh seem a little saffer.