The Antigravity XPS YTX20 is the Extreme Power Series battery in the standard YTX20 case, and it is the model Antigravity itself directs big-inch builders to: for V-twins over 103 cubic inches or high-compression builds, the RE-START line is not recommended and the XPS YTX20 is. It delivers 780 cranking amps and enough sustained current to turn over 145 cubic inch S&S motors, from a battery that weighs 4.68 pounds and drops straight into the stock tray.

This is the left side negative terminal version; choose the orientation that matches the cable routing in your tray.

Features

• 780 cranking amps with the sustained current delivery large high-compression V-twins need
• Rated by Antigravity for motors up to 145 cubic inches
• Deeper allowable discharge than RE-START models for more usable capacity
• 4.68 lbs in the standard YTX20 case, a drop-in installation
• 32Ah PbEq capacity
• LiFePO4 chemistry; holds a charge over a year without parasitic drains
• Large all-brass terminal design

Installation Notes

• Charge only with a lithium-compatible (LiFePO4) charger such as the Antigravity SC-2 or SC-4 Super-Charger. Lead/acid chargers, especially those with desulfation or recondition modes, can damage lithium batteries.
• No built-in RE-START jump starting on this model; keep a maintainer connected during long storage.
• Check state of charge every 4 to 6 months if the bike carries parasitic drains such as alarms, trackers, or always-on accessories.

Specifications

• Voltage: 12V
• Cranking amps: 780 CA
• Capacity: 32Ah PbEq
• Case: YTX20
• Weight: 4.68 lbs
• Terminal configuration: left side negative
• Chemistry: LiFePO4

Fitment

Direct replacement for the YTX20, YTX20-BS, YTX20L, and YTX20H battery positions in Harley-Davidson Softail, Dyna, 1979-2003 Sportster, and 2008-2017 V-Rod models. Also used in custom V-twin, race, and high-performance automotive applications where maximum cranking power in a compact case is needed.