It is disturb for vehicles owner when Vehicles won’t start on the road. Especially, for the people who do not care about maintenance of the vehicles, The starting voltage is more likely to be insufficient due to battery aging. In addition, some people like to install extra devices on the vehicles such as cigar lighter chargers, Bluetooth receivers, dashboard camera 3C products, etc. Those of products increase burden of vehicles and motorcycle batteries. This thesis emphasizes on research and develop a device integrates with cigar lighter chargers, voltage display, batteries aging warning and electric power failures function. It helps those who ignore aging batteries and less-maintain vehicles achieve the purpose of reminding. Further, it reduces the awkward situation that vehicles cannot get the engine on.