Go to our company website – download the newest map – use a USB cable connect the device to your compute – delete the original map – download to map. Q: Why the Map freeze and the device reminder ‘program memory is low? A: Because the map file damage or lose. Please connect your car power when running the GPS. Plug in your car charger while driving will be better. battery just assistant the GPS normal working. Considering the full battery charge as more for emergency use. A: The battery in this GPS are not designed to last a long time like a mobile phone. Q: The battery can’t charge and run the GPS.