JBD Normal BMS 4S 12V 30A 40A 50A 60A Lifepo4 Lithium Battery PCB for Freeshipping - Jiabaida BMS
Amazon.com: DALY BMS Li-ion 4S 12V 60A with Balance Wire and Temperature Sensor for 18650 Rated 3.7V Battery Charging and Discharging Protection : Electronics
12v 60a LiFePO4 Solar Battery BMS for $32- Installation and Test! - YouTube