Mine all balance perfectly, actually batter than my Optipower packs (2x 6s 2700 30C)!What I do is plug them straight into the battery checker when they arrive and if they are out of balance by 0.2v or they have a dead cell (not happened yet and I have 10 of them!) I send them back (costs a few quid but so what) remebering to input the barcode number on the HK website. If they are say 0.1v out of balance I will connect them to my charger using crocodile clips (so I don't have to remove the connectors
) and see if they balance better after a short 0.5C charge (they usually do). Most are balanced to within 0.05v anyway, some as good as 0.02v which only gets better after a couple of gentle cycles!

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