RE: question about charger?
the rate you set the amp charge at depends on the Mah rating of your battery
so if you have a 1500 Mah battery you want to charge it at 150 MAh or .15 amps, the charge is 10/C or 10% of the batteries capacity
Basically, charge it at 10% of whatever battery you have in Mah or amps depending on your charger (except lipos)