LiFePO4 280Ah 3.2V Deep Cycle Battery Rechargeable A Grade 8000-10000 Cycles High Capacity Lithium Iron Phosphate Battery 4 Pack The battery has a built-in BMS protection device that prevents overcharging, over-discharging, over-current and short-circuit��The cycle life exceeds 8000-10000 times, with an expected lifespan of over 10 years. these cells retain their charge for extended periods, making them an ideal choice for vehicles that may need to be idle for extended periods of time. These batteries are not only suitable for vehicles and high current consumption applications, but also for deep cycle and long cycle applications, such as energy storage for household or recreational vehicles. This set of lithium iron phosphate batteries has a voltage of 3.2V 280Ah, each weighing 12 pounds/5.4 kilograms, and a single battery size of 8.03×2.75×6.85 inches 3.2v 280Ah lithium iron phosphate battery is made of a brand new A-class battery, which has high energy density, long cycle life, and good safety performance. Each set contains 4pcs of A-class 3.2V 280Ah lithium iron phosphate��4 bus bars, 4 nuts