The BMS will balance out the amount of Volts in every cell as well as possible, so they all carry the same/similar amount of power. This is a slow process, So it’s advised to leave it hooked up to the charger for a additional 4~8 hours. This is not needed at every recharging session, but it’s depends on your use: daily commuter or weekend fun driver? On average it’s recommended to balance once every 5~8 recharges.
In the attached image you see:
Left: unbalanced: visually its even clear it is not optimal use of the capacity of every cell.
Middle: passive balancing: (slowly fill all cells simultaneous the same and when one reaches its maximum stop charging all).
Right: active balancing: fills each cell to its max, compares them, then tries to empty the highest a bit and use that energy to top up the lowest a bit. It’s trying to optimally use the already-present energy in your battery-pack.
There is more going on in the background, but this is generally how battery balancing works.
So by showing your 🔋a bit of ❤ and keeping it balanced, it will reward you in return with a longer lifetime.
Leave your charger connected for 4~8 hours AFTER indication full (eg. a green light) once every 5 to 8 charge cycles. It will prolong your battery lifetime – the most expensive & precious part of your eBike.
