Do the top balance or add 2-4 amp active balancer,(Hel-tec) works best when above 3.45v. Ran my Envisions with one for 2 weeks, tried the EVE without, so 20 full charge on envisions and 5 in EVE, Envisions are up in the 3.55V 109-140mv with 10 cells@3.58 range and EVE are 3.45-3.49 199-239mv...