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 orientation