RE: Help with new 7.2v nimh 4200 mah packs?
Batteries need to be charge first. First discharge the battery then you can fast charg the 4 amp max is best to prolong battery life. Alway try to slow (trickle charge) your battery often. This will increase mah (run time) A Tekin 112 charger is a good charger. around $50 75 used. Make sure the firm ware charging software is H28 or higher for NIMH batteries.