12V300Ah / 12V400Ah LiFePO4 Battery with Built-in BMS, Lithium Rechargeable Battery for RV, Solar, Marine, Home Energy, Off-Grid Applications etc.

【Long Life & Deep Cycle】Rock Power Master Lithium Iron Phosphate (LiFePO4) battery can be recycled up to 2000~6000 times and provide up to 10 years of service life. Because of its safety and stability, LiFePO4 battery can perfectly replace the traditional lead acid battery. This model uses prismatic LiFePO4 cells with better stability, higher energy density, and lighter weight, making the batteries good enough at high temperature performance, high power output, low self-discharge rate. 【Advanced Technology】Rock Power Master LiFePO4 battery possesses industry-leading technology and is manufactured with advanced technology in the industry. This model has excellent and reliable performance with sufficient battery capacity, supporting battery expansion for up to 4 series & 4 parallel and suitable for electric energy storage. 【Slow Power Loss】Rock Power Master LiFePO4 battery have high energy density, which makes it possible to ensure long-term recycling. The capacity of the monomer is still greater than 80% after 2000 cycles. This model can be repeatedly charged and discharged without any memory effect. The battery can be charged and used no matter what state it is in. 【High Safety Performance & Environmentally Friendly】 Rock Power Master LiFePO4 battery is green battery and it doesn't contain any heavy metals and rare metals, and are better environmental friendly. Almost all outdoor power sources use LiFePO4 batteries as they’re very safe and can be used in a variety of application scenarios. 【24hrs Service】Rock Power Master is committed to providing customers with outstanding customer service. And our professional technical support and customer service team are always ready here to help you solve the issue with quick feedback within 24 hours.