The Antigravity ATX20-HD battery is a High Power, lightweight lithium replacement for the popular YTX-20 size Lead/Acid battery. This is our HEAVY DUTY version, designed with significant Power and Amp-Hour Capacity in this popular case size.

• YTX20 Standardized Case Size: 6.89 x 3.4 x 5.12 inches (LxWxH)
• 780 Cranking Amps
• 30 Amp Hours (PbEq)/ 15Ah (Actual)/ 192Wh
• 5.18 lbs
• Lighted Voltage Indicator to see state of charge (doesn’t have RE-START)
• Safest Battery Technology using full BMS and Lifepo4 Lithium chemistry
• Compatible with 10 OEM battery sizes (see below)
• Can be mounted in any orientation

This battery requires a special bracket to be mounted in an Elise/Exige and Evora.   We have them available for the Elise/Exige in our webstore HERE.   Coming soon for the Evora! 

We highly recommend keeping these batteries on a Ctek lithium battery tender when not in use. 

ATX20-HD

HEAVY DUTY Series

OEM Size Lithium Battery (Direct Replacement)

The Antigravity Batteries ATX20-HD and ATX30-HD are part of our HD (Heavy Duty) Series, specifically designed to offer SIGNIFICANTLY more Amp Hours (6 Ah more per battery) and Power than the original versions of the ATX20/30 to meet the special needs of those looking for the most compact yet powerful battery. These batteries are intended for those special applications like heavily accessorized Touring Motorcycles, Racing and Street Performance Vehicles, Experimental Aircraft and more. Simply put, these are the most powerful and compact batteries available from any manufacturer.

The Heavy Duty ATX20 and ATX30 do not have our RE-START built-in jump-starting feature but offer a deeper level of Discharge for more usable Capacity and more Power for Cranking. They also offer a FULL Battery Management System (BMS) to protect the battery from over-discharge and over-charge as well as having Thermal Protections. This makes for the safest and longest life-cycle possible.