14.4VDC Lithium-Ion AH Rechargable Battery. Eliminate waiting for power during periods of high demand with this spare battery. Easy to keep charged and available, it stores in place on the charger unit. Direct spare battery for our 14.4V Lithium-Ion powered Grease Gun TY27453. Charges using our 110VAC Wall Charger TY27454 or our 12VDC Mobile Charger TY27455.