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 Amps30 Amp Hours (PbEq), 15Ah (Actual)5.18 lbsLighted Voltage Indicator to see state of charge (doesn’t have RE-START)Safest Battery Technology using full BMS and Lifepo4 Lithium chemistryCompatible with 10 OEM battery sizes (see below)Can be mounted in any orientationShipping Note: Ships via ground transportation in USA lower 48 states only, air shipping not available due to air regulations. We are not able to ship internationally or to Canada due to shipping regulations.