Power Queen 12V 50Ah LiFePO4 Lithium Battery Deep Cycle 640Wh BMS for Off-Grid System

【 1/3*Impeccably Lightweight & 100% Capacity Usage】Our 50Ah lithium battery weighs only 11.57 lbs, which is only 1/3 of the weight of 50Ah lead-acid battery, easy to move and install. And our LiFePO4 battery can charge/discharge fully of the capacity, providing astronomical boosts in run-time compared to only 50~70% capacity usage in Lead Acid. 【BUILT-IN 50A BMS & 2-Hour Fast Charging】Our 12.8V 50Ah Lithium battery build in 50A BMS, which can prevent the LifePO4 battery from the most common issue causing of battery failure, such as overcharge, over-discharge, over-current, overheating, short circuit. The BMS also support 0.5C (25A) charger that needs only 2 hours to charge 50Ah battery fully compared to Lead Acid needs 10~11 hours to fully charged which only support 1A~10A charger. 【Extendible Storage & Widely Use】The 12.8V50Ah LiFePO4 battery can be connected in parallel & in series for larger capacity. Allow being extended up to 4 in series or 4 in parallel to get Max 200Ah capacity or Max 48V(51.2V) voltage. Widely used in most areas such as RV, Solar, Household Battery, Off-Grid and Electric Scooter, Electric Handicap and so on. Note: The battery cannot be used as a starting battery. If you are not sure that, please contact customer service for relevant information. 【Longer Usage Life: 10-Year】Power Queen LiFePO4 battery provides 4000 cycles & a 10 years lifetime compared to 200 - 1000 cycles & a 3 years lifetime in typical Lead Acid batteries. Our lithium batteries can be fully charged without risk and maintain the capacity with low self-discharge rate, you can use the battery as you want even though put it aside for a long-time storage. 【24 hours Customer Service & 5-Year Warranty】We have a 24 hours *7 days friendly and professional customer service team, providing a strongly 5-year warranty and free lifelong technical support. All batteries will be tested for capacity and checked for external damage before packaging. And we provide English guideline and user manual to help you operate battery easily and quickly.   Specification: Nominal Capacity:50 Ah Nominal Voltage: 12.8 V Cycle Life: 4000 Cycles Maximum Continuous Charging Current：50 A Maximum Continuous Discharging Current：50 A Connection Method：Parallel/Series Storage Temperature：-10~50℃ Dimensions: L7.79 * W6.53 * H6.69 inch Weight: 11.57 lbs Package Included: 12V 50Ah LiFePO4 Battery Pack *1 Terminal Screws *2 Pairs Warranty Card *1 Product Manual *1 Please be noted: battery charger is not included.