ORIGINAL: zooland1
[I just wanted to make a comment on the velcro. You still want one rubber band around the battery for security. The velcro keeps the battery in position, but if you happen to make a sudden turn or (heaven forbid) bump something, the rubber band keeps it from popping loose. Heli's don't fly well with the battery hanging from them. Or worse yet, disconnecting in flight. As the song says, don't ask me how I know.
It is just not one piece of velcro attached to the battery that is attached to the battery holder. I have a velcro strip, with 2 sticky sides that come down from where the rubber bands used to be and strap the battery in for more secure flying.