So over the past few years "i was a early adopter of the M10" I've had at least 4 batteries die on me. The charger will blink red and one cell will be stuck at a low voltage like 2.7v or something. Is their anyway I can restore the one cell? Or is it just done? I've spent over $300 on batteries and now I am just down to 3 again. Used to have 6. Anyways was wondering if anyone had a trick they new to fix the one cell.