This lightweight, Bluetooth®-enabled LiFePo4 battery has an advanced BMS, temperature management system, a built-in DC heater, and auto-cell balancing for larger battery banks. Can be wired in series or parallel. ETL conforms to UL specifications and UKCA certified. Bluetooth®-enabled, smart featuresQuick-chargingIP68 waterproof (should not be submerged)10-year warranty