I just picked up this charger and went to charge a 7800mah smc 4s battery at 1c, I get to about 98% and nothing really happens, I'm not sure if its balancing or if there is some other issue going on. The battery was at 98% after 20 mins or so and i let it go another 20 mins and nothing else happened. If i'm not mistaken, it balances at the end of the charge?? Should i let it go longer? The amps fluctuate around .1 or .2 and the cells never fully reach 4.2, they are at about 4.17.