Sometimes when I change batteries the GPs doesnt works,
No turns on.its a big error for Garmin.
I have had to open it, take off the 8 screws at the back side with torch screw driver #7 and you can find that tha cover have a press contacts to translate the batteries voltage.It makes a False contact.If you make to make more pressure,its the same,again the same false contact.
Finaly I opened the GPS, soldered the possitive and negative contacts and now Its OK.
Fast and clean turning ON! see the Photos enclosed
Rating: 3.8 - 28 reviews Replace your Garmin Nuvi 780 Battery or Keep an Extra Battery on hand as a backup. This is a High Capacity 1250 mAh, Lithium-Ion Battery that offers even more up time than your original. Works in your Garmin Nuvi 780 GPS. Simple, Easy and Inexpensive! You get a New Battery, FREE Special Tools (necessary for ...
www.poi-factory.com > Garmin talk
Feb 2, 2009 - 27 posts - 16 authors
I've got a DOA nuvi 780 that I bought on eBay. It works fine while plugged into car or computer but the internal battery only holds a charge for about 15 minutes. So I guess it's not really DOA but it needs a heart transplant. Or maybe the correct analogy is a FAT transplant since the body uses fat to store ...
Rejuvenate a Nuvi Battery?
30 Sep 2011 owner rplacement of nuvii batteries
10 Jun 2009 More results from www.poi-factory.com
https://www.batteriesplus.com > Batteries > GPS > Garmin
Whether you're traveling across the country or just to an unfamiliar part of town, you rely on your GPS to get you where you're going. Unfortunately, a dead GPS battery isn't going to get you anywhere. If you're Garmin Nuvi 780 GPS needs a new battery or you just want an extra on hand just in case, Batteries Plus Bulbs can ...
the gps is turned on by raising the piece in the back that is actualy the antenna....if you havent done this thats the problem.if you have then someting is not reciaving a signal and would have to be repaired...btw the piece is sometimes mistaken as a prop like on the back of a picture.....hope this helps