6S lto ithium ion lifepo4 lipo 12V 6S smart active bms QNBBM 6S balancer Board PCBA PCM:Why my battery with weak balance?/Whay my battery can not fully charged ?/How to revive my battery ?/What is good for my battery pack ?/How to save my cost /time?/How to extend my battery span-life? /Passive bms good or active one good?/Can bms use in series? Fifty -fifty ,you need active balancers/Equalizer/BMS/ ,it can work with your existing bms system