The Antigravity Batteries ATX20-HD is a Heavy Duty lithium motorcycle and powersports battery engineered for applications that demand higher cranking power and increased usable capacity. Delivering 780 cranking amps and a true 15Ah lithium capacity (30Ah PbEq), the ATX20-HD provides dependable starting performance for large touring bikes, adventure motorcycles, ATVs, UTVs, and other 12-volt powersports systems. Built with LiFePO4 lithium chemistry and a full Battery Management System (BMS), this battery offers protections against over-charge, over-discharge, thermal stress, and includes cell balancing to support long service life. The OEM Group 20 drop-in case size ensures easy installation, while the 4-terminal layout allows flexible mounting and polarity options. The ATX20-HD is lightweight, maintenance-friendly, and includes a lighted voltage indicator to quickly check battery status. Designed for riders who need a compact battery with increased capacity and cranking output. ⚠️ Not for standard automotive use. Contact Antigravity Batteries for race-only automotive applications.