AG-401 Antigravity Battery Small Case
AG-401 Antigravity Battery Small CaseAG-401 Ultra Compact 4-Cell Lithium BatteryAntigravity AG-401 High-Power Lightweight Lithium BatteryAntigravity AG-401 Side Profile

Antigravity AG-401 Lithium Battery

5 out of 5 based on 6 customer ratings
(6 customer reviews)


The AG-401 is the smallest battery in the Antigravity Batteries line-up, and the most compact Lithium motorsport battery available. Ideal for performance applications where you need extreme weight loss, space saving, and extreme power. 120 Cranking Amps, 6 Amp Hours (Pb Eq).

In stock

SKU: AG-401 Category: Tag:


Small Case Lithium Battery

The AG-401 battery, at a miniscule 4.25″ Length x 1.25″ Depth and 3.75″ Height (to the top of the terminals), offers extreme power in the most compact size in Lithium Motorsport batteries. The AG-401 is best used for Performance applications where extreme weight loss and ultra compact size are desired. Can start inline 4-Cylinder motors up to 600cc for race use, or up to 250cc for everyday street use in scooters. This battery is also a favorite of custom builders who want the smallest battery to tuck out of the way.


  • Adhesive-Backed Foam Included for EASY INSTALLATION.
  • Most Compact of Lithium Motorsports Batteries available.
  • Ultra-Lightweight and High-Power Lithium-Ion Motorsport Battery.
  • Can hold a charge up to a year provided there are no “Parasitic Drains” (accessories that draw power when bike is off (i.e. alarms, ECUs, iPods, GPS, heated grips, etc).
  • Built in the USA to high quality standards.
  • Large all-brass terminal design.
  • Waterproof (Not intended for jetski use).
  • 3-Year Warranty (view our Warranty page for details).

Best Uses

  • Capable of every day use in bikes up to 250cc.
  • Race use for Enduro and MX electric start bikes up to 450cc. (If you have a 250cc 2-stroke you will need to use the Antigravity Battery AG-801)
  • Race and Track Day use in inline 4 cylinder 600cc sport bikes (Honda CBR600 rider should use the Antigravity Battery: AG-801).
  • Custom builds like cafe racers or small bore customs up to 350cc. (Please note if you use older classic bikes from mid 1980s and earlier you should update the charging systems to a modern voltage regulator; damaged voltage regulator can overcharge the battery and damage it.)
Antigravity Battery Series
Download Specs
Antigravity Lithium Batteries Specs Comparison
Antigravity Batteries Specs Comparison
Additional Information
Weight 1.5 lbs
Dimensions 5 x 6 x 4 in
Product Weight

1 lb

Product Size

4.25″ x 1.25″ x 3.75″ (mm: 110x32x95)

Cranking Amps


Amp Hours (Pb Eq)


Reviews (6)

6 reviews for Antigravity AG-401 Lithium Battery

  1. 5 out of 5


    We needed a battery set up and had a small area to work with and this battery did exactly what we were looking for. We created a 24 volt system for our ATV that we race at the ATV MX national motocross races.

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