Universal lithium iron phosphate batteries, the use of large capacity, laminated, flexible packaging, depleted liquid lithium-ion battery patented technology, the battery consistency better, longer life, higher security, and a variety of energy storage for electric buses ideal power supply system has been widely used Nissan, hippocampus, Yutong, Shaolin and Taiwan Schumacher and other electric buses and scenery storage, solar street lights, energy storage power plants, UPS and other fields. Product Features: flexible packaging, laminated, depleted liquid, good security, no safety valve; long cycle life, single battery module life of more than 2000 times smaller battery internal resistance, discharge rate superior performance; higher than the energy, the weight ratio of energy available up 120Wh/Kg, smaller than the energy of up to 210Wh / L, higher than the industry average; maintenance-free, wide temperature range, high reliability; against this section 3.2V50AH module batteries, specific technical parameters are as follows: Batteries Model: HPPF1216392-12.5Ah Nominal capacity: 50AH resistance: 0.8 mΩ mass energy ratio: 98Wh/Kg volumetric energy ratio: 146 Wh / L Weight: 1.8 Kg Dimensions: 55 x 168 x 131 (mm) Voltage: Nominal voltage: 3.2 V Charge off voltage: 3.75V Charging voltage: 3.65V Discharge cut off voltage: 2.0V Current: Maximum charge current: 1C Maximum discharge current: 2C Maximum pulse discharge current: 5C 10S Charging Method: Standard charge and discharge current 0.3C Operating temperature: Charging Temperature: 0 ℃ -45 ℃ Discharge temperature: -20 ℃ -60 ℃ Storage temperature: -10 ℃ -45 ℃ Cycle Life: ≥ 2000 times (80% DOD) ≥ 3500 times (70% DOD) shell temperature resistance: Long-term temperature: 135? ℃ instantaneous temperature: 170 ℃ Recommended temperature: ≤ 75 ℃ temperature discharge efficiency (-20 ℃): ≥ 70% self-discharge rate ≤ 3%