DCL12-18 DC Battery Li Fe PO4 Lithium Ion Car Battery 12V 18ah Cylindrical Cell Type DC Power Series 4000 Lithium batteries have been specifically designed to be a drop-in replacement to conventional lead acid batteries ranging in capacity from 6 Ah to 300 Ah & offers a drop-in solution to replace Lead acid batteries for applications like Marine, Leisure, Electric Vehicles & Off-Grid / Solar applications.