Insten&reg; GPS Home / Wall / Travel Charger AC Adapter Compatible with Garmin TomTom Smart IC chip recognizes a fully charged battery and automatically switches to a saver mode Plug never heats or overcharges the battery Vehicle Lighter Adapter (12~24v DC) LED charging indication GPS can be used during charging.Short circuit protection. NOTE:When using this charger for GPS device, GPS device might restart with computer mode; after less than 10 seconds of synchronization, GPS will start with GPS mode with charging from the charger