Our LiFePO4 Battery is supplied fully protected by a sophisticated specially designed lithium battery management system that constantly monitors every cell to ensure the battery is always optimized for best performance and life. Unlike gel or lead-acid batteries, Lithuim battery is safer, lighter, and more powerful with a long service and shelf life comparing to all traditional lead acid batteries. No changing of systems, equipment or extensive re-wiring is required. You simply pull your old heavy batteries out (if your back allows it) and put the new lightweight LiFePO4 battery in. It's as easy as that. This 12V 300ah battery is the perfect drop-in upgrade for your existing old and heavy batteries, Invest in this sealed, maintenance-free battery for your off-grid system today! FEATURES Built with LiFePO4 battery cells that are engineered to deliver superior Performance & longevity. Maintenance Free, No Leak. Perfect replacement or upgrade for a traditional lead-acid battery. All our battery packs are comprised of prismatic cells & are backed with LiFePO4's signature built-in BMS. They are also tested to deliver 100% real capacity and are suitable for parallel and series wiring of up to 6 battery packs. IMPORTANT:While our LiFePO4 batteries are top-notch & can be wired with other batteries of its kind, it is not advisable to connect any LiFePO4 batteries in parallel or series. This poses several risks and should only be done in emergency situations. If you must wire batteries together, make sure you are familiar with the correct procedure or seek help from a professional if needed. Suggestions From the Outbax Team Batteries connected in series should have the same amp-hour rating while batteries in parallel bank should have the same voltage rating. As much as possible, only connect batteries in series or parallel during emergency situations. It's better to go for batteries with higher voltage when running high-power electrical appliances instead of wiring two battery packs together. Our batteries are also available in 200Ah and 300Ah for larger capacity demands.