DJLBERMPW 12V 100Ah LiFePO4 Battery 12V 100Ah Lithium Battery, Built-in 100A BMS 1280Wh, 8000+ Deep Cycle Marine Battery 12V, Lithium Batteries 12V for Boat,Kayak,Trolling Motor,RV,Golf Cart,Solar

?100% Grade-A BMS Protection of 12V 100Ah Lithium Batteries?Highest-level safety is based on UL Testing Reports for the Grade A cells inside the battery and upgraded BMS, Our LiFePO4 battery has built-in 100A BMS to protect it from overcharging, over-discharging, over-current, overheating and short circuits with excellent self-discharge rate, ensuring the LiFePO4 battery's safety level and optimize the 12V battery performance. ?15000 Times Deep Cycle Marine Battery 12V&10-Year Lifespan?Our LiFePO4 Lithium Battery with higher energy density, more stable performance and greater power.Our Lithium Iron Phosphate (LiFePO4) battery can be recycled up to 4000 times(100% DOD) to 15000 times(60% DOD) and provide up to 10 years of service life.(Warm prompt:If the battery is not used continually,it should be charged every 3-5 months,that can make the battery available for a longer time) ?Lightweight Compact Design &Easy to Carry?Our 12V 100Ah LiFePO4 battery has a lightweight of 24.2lbs, only 1/3 the weight of the lead-acid battery at the same capacity, lighter and more portable for you to move or carry it. And our LiFePO4 battery More faster to be fully charged, which makes it easier to use. If you purchase more 12V 100Ah lithium batteries and add a waterproof Box, it is perfect for Marine, Boat, and Trolling Motor, making your outdoor fishing and sea gatherings more fun ?12V 100AH Expand to 48V 100AH/12V 400AH?4 Pack-12V100Ah Battery Connection Tips:1.To connect in series or in parallel,batteries need meet below conditions:first-the same battery capacity (Ah);Second-from same brand;Third-fully charge the batteries separately(voltage at res?13.4V) before connect in series or in parallel;2.Limitation for Series Connection: Up to 4 identical batteries for up to 48V (51.2V) 100AH;3.Limitation for Parallel Connection:Up to 4 identical batteries for up to 12V 400Ah ?12V 100Ah LiFePO4 Battery Multifunctional UsedDeep Cycle Marine Battery,Deep Cycle Trolling Motor Battery,Deep Cycle Boat Battery.Our 12V 100Ah Lithium Battery supports up to in series and in parallel to get more capacity,Perfect for Marine,trolling Motor,boat,RV, electric vehicles, recreational vehicles, golf carts, Solar,kayak cart, lighting, backup power supply, home energy storage,off grid application, etc ?Troubleshooting Steps?Deep discharge of the battery may cause BMS to lock up If the battery is not charge, you can try 3 ways to solve: 1. Use an equal voltage battery, positive to positive and negative to negative,it will activate the battery. 2. Use an adjustable power supply to power up the battery, positive to positive and negative to negative,it will activate the battery. 3. Remove all connected batteries and try charging with a 12V lifepo4 charger for 5 minutes to activate the battery. ?Troubleshooting Steps?When you connect 3 pack or 4 pack batteries in series, one of the batteries does not work or one of the batteries has a voltage below 13V, which may be due to voltage imbalance caused by the series connection of batteries. Solution: 1. Disassemble all series connected batteries, charge them separately, and then parallel them for 1-2 hours to maintain the same voltage. Finally, connect the batteries in series?2. It is recommended to purchase a battery voltage balancer to fundamentally solve the problem