Compact & Powerful: You Will Received Two Packs Of Dumfume 12V 300Ah LiFePO4 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.Ideal for RV, Marine, trolling motor, and Off-Grid Systems. | Extra Long Cycle Life: Crafted With Premium Lithium Iron Phosphate Batteries,Dumfume 12V 300Ah Lithium Iron Phosphate Battery 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.Dumfume lifepo4 battery Solution Highlights Its Durability And Reliability, Making It The Best Choice For Long-Term Use. | Safety & Durability: Dumfume 12V 300Ah Rechargeable Lithium Iron Phosphate Battery Have Passed Relevent 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.Can be used for trolling motors with power less than 2 kW. | Crafted With High-Strength, Impact-Resistant ABS Casing,Dumfume 300ah deep cycle battery Excels In Heat, Weather, And Flame Resistance. It Ensures Stable And Lasting Power In Harsh Environments. 12.8V 300ah lifepo4 battery Can Be Connected In Parallel And Series. Powerful Energy Extension System Meets Diverse Power Needs. Ideal For Home Energy Storage, Power Walls,Rvs, Campers, Trailers, Boating, Fishing. | Note:Dumfume battery 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!