SOK Battery 12V 206Ah LiFePO4 Battery With Bluetooth & Built-in Heater

7 year warranty and maintenance free with a 3000-8000 cycles life span. Detachable cover with replaceable BMS and cells. Built-in heater pad for use down to -4°F. Bluetooth 4.0, support iPhone or Android smartphone. Support connect in parallel for larger capacity. Built-in smart Battery Management System (BMS). Low temperature charging cut-off. High temperature charging or discharging cut-off. Over charging and discharging protection. Over current and short circuit protection. Battery cells auto balance. Please note for connecting in series: NOT OVER 4 Batteries IN SERIES, and make sure to add the battery voltage balancer.