The Antigravity XPS V-12, also cataloged as the YTX12-24, packs 720 cranking amps and 30Ah PbEq into the compact YTX12 case. It is one of the models Antigravity specifically directs builders to for custom V-twins over 103 cubic inches and high-compression motors, where the current draw exceeds what RE-START batteries are designed for.

The small footprint makes it a favorite for custom builds where the battery hides in a tight box, while the output starts motors that stall far larger lead/acid batteries.

This is the left side negative terminal version.

Features

• 720 cranking amps from a YTX12-size case
• 30Ah PbEq capacity with a deeper allowable discharge than RE-START models
• Antigravity's rated class for custom V-twins over 103 cubic inches
• 5 lbs, with weight savings up to 14 pounds against comparable lead/acid batteries
• Direct drop-in for YTX12-position trays; compact enough for custom battery boxes
• LiFePO4 chemistry; holds a charge over a year without parasitic drains

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: 720 CA
• Capacity: 30Ah PbEq
• Case: YTX12, 5.9 x 3.43 x 5.12 in (L x W x H)
• Weight: 5 lbs
• Terminal configuration: left side negative
• Chemistry: LiFePO4

Fitment

Sold as a compact high-output battery for custom V-twin, race, and performance applications rather than against a factory fitment chart. It installs anywhere a YTX12-size case fits or in custom battery boxes; confirm case dimensions and cranking requirements against your build before ordering.