The NEW Antigravity AT12BS-RS is a hi-power, lightweight Lithium-Ion battery, built with our groundbreaking RESTART Technology (built-in jump-starting) so you wont ever get stranded with a dead battery again! Directly replaces the OEM Lead/Acid YT12-BS and comes in a Heavy Duty version also. YT12-BS case size: 5.9 x 2.75 x 5.12 inches (LxWxH) 360 Cranking Amps 12 Amp Hours (PbEq)/ 6.1Ah (Actual) 2.3 lbs Safest Battery Technology using full BMS and Lifepo4 Lithium chemistry Compatible with 4 OEM battery sizes Can be mounted in any orientation