【Low Temperature Protection】LiTime 36V(38.4V) 55Ah battery maximizes your battery life and charging efficiency with the low-temperature charging cutoff protection. It can charge above 32℉ and cut-off charging below 32℉. Keep safe and power up even in the coldest conditions. 【Upgraded 55A BMS & Grade A Cells 】LiTime 36V(38.4V) 55Ah TM LiFePO4 Lithium Batteries have exceptional quality with 12 Automotive Grade LiFePO4 Cells. The built-in 55A BMS, specially designed for trolling motors to protect them from humidity and salt spray, has multiple protection (low temperature, high temperature, short circuit, overvoltage, overcurrent, and Undervoltage). 【Highest Energy Density】With the Max 1C discharge current, it is suitable for trolling motors under 120 lbs thrust. LiTime 36V(38.4V) 55Ah battery is lighter and more powerful than similar Lead Acid batteries. It has an energy density of 61.41 Wh/lb (2112Wh/34.39 lb = 61.41Wh/lb), 185% higher than similar Lead Acid batteries. 【Max. 8.448kWh Energy Expansion】LiTime 36V(38.4V) 55Ah battery supports up to 4 parallel batteries to build a 36V 220Ah battery system ( Max. 8.448kWh energy & Max. 8.448kW load power). Ideal for applications such as trolling motors, home energy storage, solar power systems, caravans, and outdoor activities. 【100% Efficiency & Long Service Life】LiTime LiFePO4 battery is designed to deliver efficient and sustainable power for your needs with a flat discharge curve that provides 100% capacity usage, low self-discharge rate and low-capacity loss. It provides over 4000+ cycles & a 10-year lifetime compared to 200-500 cycles & a 3-year lifetime lead-acid battery. 【Cautions & Outstanding Service】The 36V(38.4V) 55Ah TM battery is suitable for energy storage, but not for starting and golf carts. Professional technical support, customer service, easy-to-understand operation manuals, phone support, and 24-hour quick online feedback are provided.