A:Answer Normally it will take several hours to fully charge the battery. The GPS is designed to be plugged in at all times. Even if the device is fully charged, it may not last on battery power alone for very long and the battery icon could become low fairly quickly. If you need additional assistance, Garmin Product Support is happy to help. Our contact information and hours of operation, can be found on at: https://support.garmin.com/en-US/