I have a Garmin 4NSF Sat Nav as supplied from new, has anyone changed the battery? I have put it on charge from a phone charger as the battery warning came up.

Replacement batteries are advertised on eBay, but have no idea of  if I can replace it myself. Any help much appreciated.

Thanks

Changed one a few years back using this guide;

 

https://www.upownersclub.co.uk/threads/howto-change-the-battery-in-the-maps-and-more.6714/#post-72438

Thanks Simon, received a battery yesterday and changed it using the very same guide. Appreciate your help

Just to say that I successfully replaced the battery obtained from eBay(£12), I was told by Garmin that owner battery replacement was not possible.

It was surprisingly easy, 4 screws,unclip edges (start at top and sides)the bottom will have a ribbon cable that can stay attached(acting almost as a hinge).

The microphone will dislodge but is easy to replace.

No idea of battery longevity,but worth a try if you need to replace.