weize lifepo4 battery lithium iron phosphate 100ah 12v, built-in bms up to 7000 deep cycle rechargeable battery perfect for rv/camper, marine, overland/van, and off grid applications system weize weize smart lithium iron phosphate battery integrates smart battery management system (bms) not only protects this 12-volt 100ah lifepo4 battery from various abnormal conditions but monitors and manages the charging/discharging process. the state-of-the-art battery cells ensure a long cycle life and exceptional discharge performance. compare to heavy-duty lead acid battery, this lightweight, auto-balanced, ultra-safe, long-cycle-life lithium-ion battery is the perfect for your outdoor using.<br><br> auto-balance: connects multiple batteries in parallel safely without internal state non-uniformity issues.<br> high quality: state-of-the-art battery cells ensure a lifespan of more than 4000-cycles, 100 amp continuous discharge currentand a wide range of operation temperature<br> please do not string the battery in series, it is made only for 12-volt parallel connections using the batteries of the same manufacturer and model.<br> terminal size: m6, diameter of the screw: 1/3 inch.<br> parcel included: 1 x battery (terminal screws included, but no any other accessories).<br><br> note: make sure to tighten the battery terminals securely and use appropriate size wiring, or it could result in overheating and battery damage.<br><br>troubleshooting<br>when the battery voltage is too low to reliably power loads, please charge the battery as soon as possible.<br>if the battery temperature is too high or too low, please cut off all connections and let the battery stand by until it cools down or warms up to room temperature..<br>when too high of a current passes through the battery and causes battery failure, please disconnect the load until the battery resumes normal operation.<br>if the battery fails due to a short-circuit, please remove the short circuit immediately and the battery will resume normal operation.<br>when the battery voltage drops to ov, please activate the battery using an external charging source that has a lithium battery activation function.