by vulrath » Fri Aug 10, 2012 8:25 am
Balancing is done by the charger, or by a dedicated balancer that plugs into the small secondary connector coming out the side of the battery (not to be confused with the actual battery leads). Personally, I like an ESKY charger. $10-15 on ebay, and the only reason I have to buy a new one is because I lost the old one. I've used it across 4 batteries that have worked flawlessly.
However, HobbyPartz is a good site. All of my batteries come from them.
and 7.4, I've decided, is right between 8.4v and 9.6v on the rate of fire scale. It's what I use in my P90, because it fits the battery compartment like a hand in a glove and gives my gun the speed boost I desire.