with my glow plane I have a 2.4 Futaba FAAST 7Ch system. The radio was packaged with servos, battery, and futaba charger (not a fast charger). I have been charging both the tx and rx after each flying session or when I notice the tx voltage getting down to less than 9V or so.

am I pretty safe doing it this way, or am I going to eventually end up like my buddy unless I buy more gear to analyze my batteries?