BMS 4S 12V /7S 24V / 8S 24V/10S 36V 20A-100A Battery Protection Board LiFePo4 UK. UK JBD 6-21S 100-200A 48V Li-ion Smart BMS Built-in BT BMS + 1 NTC + 1 BT Module. 4S 12V 300A Lifepo4 BT (Fan) Smart BMS Common Port Balance with Bluetooth Module.
eBay