I've searched high and dry (including this forum) for a couple of hours on a recommended solution for maintaining the battery aux pack for the M5 which is the 1.3Ah 14.8V 4S. I would very much like to keep my battery packs for a long time but to do that, I have to store them at the recommended 3.8V or approx 50%. I'm not an electrical engineer but I am a one man band video producer. Does anyone have a simple solution to 1. Balance and maintain, 2. Decharge my Freefly M5 battery correctly? I've looked at a dozen balancers, minders, and gizmos with light bulbs on them but not sure they will work with or would even ruin my M5 batteries. Please help.