RE: Recommended battery for Hacker 20-20
Mostly any of the newer 3s 1600 (or around there) should work real well. I personally use and prefer Duralite's Thunder Plus because of the Safe Charge Cell Balancing circuitry, but any of the newer lipolys ones will work fine too. I don't have experience with the Super planes yet, but 1600mah is what most people like on them.