The NEW Antigravity ATX12-RS is a hi-power, lightweight Lithium-Ion battery, built with our groundbreaking RE-START Technology (built-in jump-starting) so you wont ever get stranded with a dead battery again! Directly replaces the OEM Lead/Acid YTX12 and comes in a Heavy Duty version also. YTX12 case size: 5.9 x 3.38 x 5.19 inches (LxWxH) 360 Cranking Amps 12 Amp Hours (PbEq)/ 6.1Ah (Actual) 2.6 lbs Safest Battery Technology using full BMS and Lifepo4 Lithium chemistry Compatible with 12 OEM battery sizes Can be mounted in any orientation