Antigravity YTX12-20 Lithium Battery

(17 customer reviews)


The lightweight Lithium YTX12-20 motorcycle battery is an ultra Hi-Power model in our original OEM exact-fit lineup. This Antigravity Battery comes in the standard OEM YTX12 case format so it fits many powersports vehicles, making an easy drop-in replacement solution. Due to its compact size it can also be used in all V-Twins or applications where the most power is desired in the smallest package possible. Great for Race Cars also.

  • YTX12 case size
  • 5.9 x 3.43 x 5.12 inches (LxWxH)
  • 600 Cranking Amps
  • 26 Amp Hours (Pb Eq)
  • 4.2 lbs
SKU: AG-YTX12-20 Category:


Lithium Battery

Formerly called ATX12-20

At a massive 600 Cranking Amps, ultra lightweight 4.2 lbs and an extremely compact size, this battery offers the greatest power in the smallest package you can find for motorsports. The Antigravity YTX12-20 is best used for applications where extreme POWER in an ultra compact size is desired. Examples are Large V-Twins Motors, Touring bikes, Adventure Bikes and Race Cars. The YTX12-20 does not have our RE-START built-in jump-starting feature but offers a deeper level of Discharge for more usable Capacity and more Power for Cranking.


600 CA


26 Ah


4.2 lbs


5.9 x 3.4 x 5.1″


  • Ultra-Lightweight, Most Compact and Highest Power Lithium-Ion Motorsport Battery made.
  • Can offer weight savings of up to 28 pounds in race cars and 14 pounds in Motorcycles.
  • 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).
  • Large all-brass terminal design.
  • 3-Year Warranty (view our Warranty page for details).

Best Uses

  • Excellent for every day use in bikes up to 2300cc. Great for extra large high performance V-Twin motors.
  • Excellent for Touring Bikes, Adventure Bikes and Bikes where extreme power and larger Amp Hour capacity are needed.
  • Excellent for use in Race Cars of all types including large V-8 motors.

Not for use in Passenger Cars or Street use Automobiles.
Not for use in PWC (Personal Watercraft).

Proposition 65 Warning

WARNING: Cancer and Reproductive Harm –

Additional information
Weight 4.5 lbs
Dimensions 5 × 6.5 × 4 in
Product Weight

4.2 lbs

Product Size

5.9 x 3.43 x 5.12 in (mm: 150x87x130)

Cranking Amps


Amp Hours (Pb Eq)


Reviews (17)

17 reviews for Antigravity YTX12-20 Lithium Battery

  1. Jason Huckabee (verified owner)

    In short, I burned this 600 CCA battery up cranking on it too long. Melted the lugs in the housing. But I bought the 720 CCA battery from a distributor of Antigravity (which is why I had to leave the review here on the 600 CCA page) and it breathed LIFE into my ’07 Harley Street Glide 110 Screamin Eagle. My bike used to be called “Kranky” by the guys cause it was so damn hard to start. Now, with the 720 CCA it fires up effortlessly. These batteries really are amazing and worth the inve$tment. Now I’m not afraid to kill the engine at a gas station with a hot engine cause I know ol’ Kranky will fire up.

  2. Anonymous

    I have a 2005 Bourget with a S&S 117
    I’ve always had cold starting issues with the bike as the season starts to get colder Even with compression releases hard starting. I’ve tried everything from changing batteries to warming up motor with a space heater before riding.
    I ordered the YTX12-20 with 600 CCA
    I was amazed at the batteries light weight
    So far I am impressed. The battery actually gets stronger after the 2nd and 3rd turn of the key.
    Hopefully problem solved

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