Small Size & High Energy: The 12V 300Ah Lithium Iron Phosphate Battery Weighs Only 57 lbs, 1/3 The Weight Of A Comparable Lead-Acid Battery. Its Energy Density Is Nearly Double That Of An Equivalent Lead-Acid Battery, With An Impressive Energy Capacity Of Up To 3840Wh. Its Compact Design Is Easy To Carry And Install, Delivering Maximum Functionality In Minimum Space.Extra Long Cycle Life: Crafted With Premium Lithium Iron Phosphate Batteries, This Product Boasts A Lifespan Of Up To 10 Years. It Supports 4,000 Cycles At 100% DOD And Up To 15,000 Cycles At 60% DOD, Which Is More Cost-Effective Than Traditional Lead-Acid Batteries (Only Provide 200-500 Cycles) With Significantly Fewer Replacements.This Innovative Battery Solution Highlights Its Durability And Reliability, Making It The Best Choice For Long-Term Use.Safety: Our Batteries Have Passed CE, ROHS, UN38.3, UL1642, UL2580 Certifications. Built-In Battery Management System (BMS) Provides Overcharge, Overdischarge, Overcurrent, Overheat And Short Circuit Protection. With High/Low Temperature Automatic Cut-Off Function To Ensure Safe Charging/Discharging.Crafted With High-Strength, Impact-Resistant ABS Casing, Our Product Excels In Heat, Weather, And Flame Resistance. With IP67 Waterproof Design, It Ensures Stable And Lasting Power In Harsh Environments. Batteries Can Be Connected In Parallel And Series. Powerful Energy Extension System Meets Diverse Power Needs. Ideal For Home Energy Storage, Power Walls, Off-Grid Systems, Rvs, Campers, Trailers, Boating, Fishing.Note:Under Various Temp/Humidity Measurement Methods And Instruments, Voltage And Current May Deviate By 1%~5%. Charge/Discharge Battery Once Every 6 Months To Prevent Damage From Disuse.Please Feel Free To Contact Us If You Encounter Any Problems During Use!