How to Replace the Internal Battery on a Garmin 100 GPS

Updated March 23, 2017

The Garmin 100 GPS is a personal navigation device that utilises Global Positioning System (GPS) technology to pinpoint the device's location on the earth. The device, a GPS satellite receiver, superimposes a map of your surroundings on a viewscreen, acting as a guide to help you to navigate the roads or terrain around you. The GPS 100 is one of Garmin's early products, released in 1992. The GPS 100 is equipped with a rechargeable battery pack, but I can be operated with AA batteries. The procedure for replacing the internal rechargeable battery or replacing AA batteries is the same.

Turn off the GPS 100.

Remove the mounting bracket if it is installed.

Remove the data/power cable or charger from the device.

Push and hold the release catches on the rear of the unit.

Slide the battery pack out of the unit.

If using AA batteries, place batteries into the pack.

Slide the new battery pack into the unit until it clicks into place.

Replace the charger or cable if desired.

Return the unit to the mounting bracket if desired.


The unit will weigh less with AA batteries than with the rechargeable pack. Therefore, when using the device for handheld navigation, AA batteries may be desirable.


Replacing the original Garmin GPS 100 rechargeable battery may invalidate your warranty. Check the product's documentation for warranty information.

Things You'll Need

  • Replacement battery pack or
  • AA batteries
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About the Author

Ashley Seehorn has been writing professionally since 2009. Her work has been featured on a variety of websites including: eHow, Answerbag and Opposing Views Cultures. She has been a teacher for 20 years and has taught all ages from preschool through college. She is currently working as a Special Education Teacher.