Polinovel lithium ion lifepo4 battery is designed & developed to outperform traditional lead acid batteries by offering more usable & reliable power with much less weight and truly free of maintenance. Compared with traditional lead-acid battery, lithium battery has overwhelming advantages in cycle life, charging & discharging, and more tolerance in high temperature. They are smarter and safer with BMS (Battery Management System) to protect the battery from over charging, over discharging, over current, short circuit and over temperature. Polinovel Lithium Ion Battery Features · Adopts patented 32650 cylindrical LiFePO4 cells · “BMS + Safe Board” dual protections provide safe power · Screw fastening structure increased battery durability · Market proven outstanding performance in harsh environment · Support maximum 4pcs connection in series or parallel to expend energy · Trustworthy innovative lithium battery manufacturer Bluetooth Communication Utilizing intelligent Battery Management System (BMS) and Bluetooth communication technology, you can freely monitor battery status from the smartphone or tablet. Monitor Battery Data  With the Polinovel free Bluetooth app, you can get instant access to the battery voltage, capacity, state of charge (SOC), cycles, temperature and a complete log on any potential issues. Optimum Performance Intelligent BMS monitors and reacts to voltage, current, temperature events to maximize battery life, performance and safety. Lithium Battery Specification HT12200 Model: HT12200 Nominal Voltage: 12.8V Nominal Capacity: 200Ah Energy: 2560Wh Connection: max. 4pcs in series or parallel Standard Charge Volt: 14.6V Discharge Cut-off Volt: 10.0V Standard Charge Current: 10A-100A Max. Charge Current: 100A Const. Discharge Current: 100A / 160A Peak Discharge Current: 200A (<5s) / 320A (<5s) Dimensions (L x W x H): 520 x 240 x 220 mm Weight: 27kg Terminal Type: M8 Case Material: ABS Enclosure Protection: IP56 Cell Type: Cylindrical Chemistry: LiFePO4 Communication: Bluetooth Operation Temperature Range: Charge: -35 to 45 ºC (31 to 113 ºF); Discharge: -35 to 60 ºC (31 to 140 ºF) Storage Temperature Range (1;3;6 months): -20 to 60 ºC (-4 to 140 ºF); -20 to 45 ºC (-4 to 113 ºF); -20 to 25 ºC (-4 to 77 ºF)