I keep an eye on them when they go into the charger. If they are within a few 100`s of a volt of each other, I don`t worry about it (Ex: 3.42 vs. 3.40). If one shows a uncharacteristic loss over the other (ex: 3.41 vs. 3.55), they be getting divorced and separated into single battery mods at that point.
BOL
BOL
