16pcs 1S qnbbm Active battery balancer equalizer repair lithium ion Titanate NCM nimh LiFepo4 LTO Batteries battery repair device 16s Power wall bms lithium battery equalizer: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