I bought an Etronix discharger/balancer for £20ish.
You can balance before or after charging and it shows your voltages etc. They've released one that also shows the capacity left too which'll no doubt be more expensive.
I use the balancer so i can balance 1 pack while charging another to save time. I bought an Etronix powerpal charger and it balance charges as well as fast charges. Balance charging takes a bit longer though.
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