JKBMS JK-BD6A20S10P 7S-20S Active Balance Smart BMS 100A 0.6A Bluetooth RS485 for LiFePO4/Li-ion/LTOOverview JKBMS JK BD6A20S10P is an active balance smart BMS for Li ion, LiFePO4, and LTO battery packs, supporting 7S 20S (Li ion), 8S 20S (LiFePO4), and 12S 20S (LTO). It provides 0. 6A active balancing (Full State On), 100A continuous charge discharge current, built in Bluetooth for Android iOS, and RS485 communication (default). Wiring output is Common Port (Same Port). Key Features Active balance method: Active Balance (Full State On) Balance