5S PCB PCBA BMS Balancer lifepo4 Battery Monitor Active universal for lithium ion LiFePo4 LTO NCM batteries PCB PCBA for lithium Universal battery monitor bms lifepo4:We know about your worries :Why may battery bms with weak balance /Why my battery can't be fully charged /How to revive my old battery /how to repair my battery /What's good for my battery packs.You might need try our battery voltage balancer/also called battery equalizer /active bmsAfter balancing ,voltage of each cell gonna be within 5-10mv