Kusroie Lifepo4 Battery: unlike lead acid battery, Lifepo4 is of lightweight, excellent cycle life-long longevity, green energy (not contain any acid and heavy metals such as lead, cadmium, mercury), safe and reliable. Built in BMS: Battery Management System protects it from overcharge, deep discharge, overloading, overheating.Due to the BMS, if put batteries in series or parallel, The maximum series number of batteries shall not exceed two, and the parallel number shall not exceed four. To avoid battery damage, only connect with this battery, do Not with battery of other brands or capacity. Ultra-Light Weight: only 1/3 weight of normal lead-acid battery; portable for outdoor using, perfect for RVs, Marine and Off-Grid Applications ect. Kusroie Smart Lithium Iron Phosphate Battery integrates smart battery management system (BMS) not only protects this 12-Volt LiFePO4 battery from various abnormal conditions: overcharge, deep discharge, overloading, overheating. 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 perfect for your outdoor using. Note: tighten the battery terminals securely and use appropriate size wiring, or it could result in overheating and battery damage. This is extra lightweight, portable and perfect for outdoor using. Don't cover items that have been abused, burned and damaged in any form. We are a professional worldwide wholesale factory. High product quality, reasonable prices, excellent customer service and a reliable credit standing is our tenet. This item is in the category "Consumer Electronics\Multipurpose Batteries & Power\Rechargeable Batteries". The seller is "kusroie_de" and is located in this country: US. This item can be shipped to United States.