Some smart BMS may have active balancing for the entire pack and adjust voltage for an entire P group but not a single cell and not all smart BMS have active balancing and that is not balancing individual cells but balancing the pack so actually they should say pack balancing not cell bancing cuz technically its different.Neither will balance a individual cell. when cells are put in parallel they are no longer individual, that entire group is acting as one. an active BMS will balance an entire group in a pack. a smart bms will not and neither are capable of balancing an individual cell. a smart bms will shut a pack down when it sees that an entire P group is way off. That's what it supposed to do some don't even do that. individual cells balance themselves once they are connected in parallel and a cell balancer does that prior to you connecting them so there's no rush of current. Smart BMS also gives you output pwr readings and temp readings as well full telemetry I didnt mention because I was focused on balance issue.
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