The Antigravity AG-1601 is the powerhouse of the Small Case line: 480 cranking amps from the smallest, lightest 16-cell lithium battery made. It is the battery custom V-twin builders reach for when the build needs real cranking power but the battery still has to disappear into a box or the frame.

Antigravity rates it for custom V-twins up to 1600cc, and it is a common pick for adventure riders who want extra power and capacity in less space.

Features

• 480 cranking amps, the strongest of the Small Case line
• Smallest and lightest 16-cell lithium battery made
• Rated for custom V-twins up to 1600cc
• Mounts in any orientation; vibration resistant
• Large all-brass terminal design
• LiFePO4 chemistry; holds a charge up to a year without parasitic drains

What's Included

• AG-1601 lithium battery
• Adhesive-backed installation foam

Installation Notes

• Small Case batteries use balance charging without an onboard BMS; Antigravity positions them for race, off-road, and custom applications.
• On classic bikes from the mid-1980s and earlier, update the charging system to a modern voltage regulator before running a lithium battery; a failing regulator can overcharge and damage it.
• 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.

Specifications

• Voltage: 12V
• Cranking amps: 480 CA
• Format: 16-cell Small Case
• Chemistry: LiFePO4 (balance charging, no onboard BMS)

Fitment

Sold as a compact power cell for custom and race builds rather than against a factory fitment chart. Mount in any orientation with the included adhesive foam, in a battery box, or tucked into the frame; confirm dimensions and cranking requirements against your build.