PCBAChina 7s 20A PCM BMS for 24V 25.2V 25.9V Li-ion/Lithium/ Li-Polymer 21V 22.4V LiFePO4 Battery Pack with Hdq or I2c Communication Protocol (PCM-L07S20-F11), Find details about China Rickshaw BMS, LiFePO4 Battery BMS from 7s 20A PCM BMS for 24V 25.2V 25.9V Li-ion/Lithium/ Li-Polymer 21V 22.4V LiFePO4 Battery Pack with Hdq or I2c Communication Protocol (PCM-L07S20-F11)