A TPMS (Tire Pressure Monitoring System) display that plugs into your vehicle’s cigarette lighter (also known as a 12V accessory socket) does not have a traditional “battery life” or “runtime.” Unlike battery-powered or solar-powered displays, it is designed to be powered directly by your vehicle’s electrical system. Its operation is entirely dependent on the power state of the cigarette lighter socket. Therefore, its effective “runtime” is either the duration of your drive or, in vehicles with always-live sockets, potentially until it contributes to draining the car battery over several days.
