This video tutorial will guide you on how to change the battery of your Garmin Nuvi 1390T. When you buy a replacement battery be sure that it comes with a tool kit just like the one shown in this video.
CAUTION, the propose of this video is to provide you with information and to guide you on how change the battery of your Garmin Nuvi 1390T. It will void your warranty once you conducted the troubleshooting steps. Following and doing the instructions on this video is at your own venture and GizmoAid is not liable and not accountable to replace the Garmin Nuvi 1390T.
Source:
http://www.youtube.com/watch?v=0krwTqo3sZw&feature=player_embedded