The OEM Automotive Tools OBD-II Memory Saver, No. 24453, protects onboard automotive computer memory when the battery is disconnected. It can be used with any power source and preserves stored fault codes and programmed electronic settings such as clocks, radios, seat positions, keyless entry systems and more. The device, which offers a replaceable fuse to protect sensitive vehicle components from damage, plugs directly into the vehicle's OBD-II port and includes a power plug to OBD-II connector adapter lead.