How to replace the battery?
The unit will no longer hold a charge we suspect its the battery but Garmin does not support self repair
You must RUN the software coming with your computer and make the test for battery.
Normally when you start and the coming o.system coming press the F2 or esc depend of your mark of computer, and enter and follow the step.
2) Run the diagnostic recovery software.\ coming with the computer
God bless you