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Antigravity Batteries AG401

  • Antigravity Batteries  AG401
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Product Description

This is the smallest battery in the Antigravity Baterries line up.  At a miniscule  4.25" Length x 1.25" Depth and 3.75" hieght (to the top of the terminals) this battery offers extreme power in the most compact size in Lithium Motorsport batteries. This battery is best used for applications where extreme weight loss and ultra compact size are desired. This battery is often chosen for Performance applications where compact size and low weight are desired.  Can start inline 4-Cylinder motors up to 600cc for race use, or up to 250cc for everyday street use in scooters  Also a favorite of custom builders who want the smallest battery to tuck out of the way.


  • Most Compact of Lithium Motorsports Batteries available- ADHESIVE BACKED FOAM INCLUDED FOR EASY INSTALLATION
  • Ultra-Lightweight and High Power Lithium Nano-Phosphate Motorsport Battery
  • Can hold a charge up to a year provided there are no "Parasitic Drains" (accessories that draw power when the bike is off...such as alarms, ECUs, ipods, GPS , heated grips etc...)
  • Built in the USA to high quality standards with large all brass unbreakable terminal design.
  • 3-Year Warranty----check manufactures website for details  (antigravitybatteries.com)
  • Waterproof
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 Batteries AG801) 
  • Race and Track Day use in inline 4 cylinder 600cc sport bikes- (Honda CBR600 rider should use the Antigravity Batteries AG801)
  • 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 sytems to a modern voltage regulator, damaged voltage regulartor can overcharge the battery and damage it)
Technical Details
  • 120 Cranking Amps
  • 6Amp Hours (PB Eq)
 Dimensions and Weight
  • USA SIZE (LxWxH)   4.25" x 1.25" x 3.75" (Height is measured to the top of the terminal bolt heads) 
  • USA WEIGHT     16oz 
  • METRIC SIZE (LxWxH)  110mm x 32mm x 95mm  (Height is measured to the top of the terminal bolt heads)    

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Product Reviews

  1. Abolute Top of the Line Quality 5 Star Review

    Posted by on 27th Jan 2015

    The customer service is great and these batteries work as advertised or better. They have tons of power to start those big motors and seem to last forever. After a cold winter the bike fires right up with no trickle charging, actually no attention at all for the whole winter!

  2. great product, poor customer service 5 Star Review

    Posted by on 25th Aug 2014

    Bought new 4 cell battery in March, battery failed in June, no big deal, these things take a lot of abuse, but after sending the battery back for warranty, took 2 months to get it back., after several phone calls. (Each person I spoke to I had to start all over they each had to look up every bit of my info)

  3. lite weight loaded with power 5 Star Review

    Posted by on 6th Jan 2014

    Excellent product will recommend to all fellow bikers !!! Thanks ,Antigravity

  4. Antigravity Batteries are awesome!! 5 Star Review

    Posted by on 23rd Feb 2013

    The managment of Antigravity are excellent. I had an issue with an older battery that was not covered by warranty, and they cut me a deal on a new style battery that is just great. The product is light, powerful, and looks good. The best part are the dimensions and weight.

    What can I say, great product and super people to deal with. 5 stars. Putting on one my stand up racing jet ski next.

  5. Light weight Honda 5 Star Review

    Posted by on 22nd Jan 2013

    Fast service on a excellent product. It exceeded my expectations. Highly recommend for your next battery

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