Download the app to connect and monitor your SOK Battery. Search ABC-BMS on google or apple store, download and install. Please note: SOC is initially incorrect, it takes 2 full charge / discharge cycles to reach proper calibration. Check here for details 7 year warranty and maintenance free with a 4000-8000 cycles life span. Detachable cover with replaceable BMS and cells. Built-in heater pad for using in down to -4°F. Bluetooth4.0, supprot 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 add the battery voltage balancer. Charge information: Recommended Charge Current 20 A Maximum Charge Current 70 A Recommended Charge Voltage 14.6 V Discharge information Maximum Continuous Discharge Current 170 A Peak Discharge Current 200 A (3 s) Recommended Low Voltage Disconnect 10.4V Size Information: Terminal Type: M8, 5/16 lugs Weight: 27 lbs. Temperature Information: Discharge Temperature -4 to 140 ºF Charge Temperature -4 to 113 ºF Storage Temperature 23 to 95 ºF Certifications Information: UL1973&IEC62619 for Battery cells.