I have a Garmin GPSmap 60CSx handheld GPS. I have used it while hunting and boating. Lately, the gps has started to shut down itself. It is very annoying when the power goes out when you need the device.
The device works flawlessly when powered though USB-connector or Garmin power connector. Power issues are only when used on batteries. There has to be a problem with how the batteries are connected to the board.
The problem was also more frequent when boating because of the vibration.
Clearly the connection is not rugged enough. So I decided to dissassemble (and reassemble) the device.