High-Performance LiFePO4 Battery: This set includes two 12.8V (12V) 100 Ah LiFePO4 batteries, each built with Grade-A cells for long-lasting power. Enjoy 4,000-15,000 deep cycles with over 80% DOD after 4,000 cycles. Max Charge/Discharge Current: 50A Ideal Lead-Acid Replacement: Weighing only 20.5 lbs, this lifepo4 lithium battery is 1/4 the weight of a typical lead-acid battery, yet delivers 2-3 times the energy density and a 10-year lifetime. Note: Not for engine starting Low-Temperature Protection: Our deep cycle battery is built to perform in harsh environments from -4°F to 140°F. It automatically stops discharging below 5°F and charging below 14°F, ensuring secure and stable performance—even in extreme weather Smart BMS, Secure Power: The built-in battery management system guards against overcharge, overcurrent, over-discharge, short circuits, and high temperatures. It keeps your battery balanced and boosts overall lifespan T14 Terminal for Easy Setup: This deep cycle lithium battery is equipped with the T14 standard terminal for quick connection to RVs, boats, trolling motors, solar systems, and home storage. Supports series and parallel configurations up to 16 batteries. Note: Only connect batteries of the same brand and model purchased at a similar time, with the same capacity and BMS parameters