14.8 until the cells bubble 2 bubbles per second. After establishing the weak sister cell.no need to play musical chairs with voltage. Unless you like gimmickry. Some other "magic formulas" I have read damned near required the battery owner chant the I Ching while charging. Record the elapsed time it takes to recharge the weak sister cell then simplify things with a charger timer shutoff. Battery charging is not Voodoo and none of those TV host grade experts have disassembled a battery to see what effect their exclusive charging profile has had on it. They have to be different because they fear losing identity of exclusivity. Set voltage at 14.8 then start using a timmer
