Garmin is recalling some of it's Nuvi's due to a battery problem.... Evidently an overheating issue that can cause fire. Go here to check your serial number for recall:
https://my.garmin.com/rma/recallLanding.faces
My 780 wasn't in the recall list, but wanted to pass this along.
https://my.garmin.com/rma/recallLanding.faces
My 780 wasn't in the recall list, but wanted to pass this along.