What do you do when your Garmin nuvi GPS will no longer hold a charge, and the internal battery doesn't last more than a few minutes? You could just live with it and always use the vehicle power adapter. Or you could send it in to Garmin for repair.
There's another option: It turns out that replacing the internal battery is an easy task that takes just a few minutes to complete. Here's everything you need to know to successfully replace the internal rechargeable battery, complete with step-by-step instruction.
Important Note: This is an easy procedure, but doing so may void your warranty. GPSmagazine.com assumes no liability expressed or implied for any damage to your device.
Figure 1: Garmin nuvi Battery Replacement Kit
Battery replacement kits are available from various vendors. I bought this nuvi 700 series replacement kit on Amazon.com. Most battery replacement kits come with all the tools you'll need to perform the battery switch, pictured above.
Figure 2: Garmin nuvi 765T & Battery Replacement Kit
The basic process for replacing the battery is pretty simple:
Let's get started.
Figure 3: Garmin nuvi 765T, Rear
The first step in replacing the internal battery is removing the two small hex screws shown located on the rear of the case.
Different Garmin models use different screw types. The 7x5T models use a small hex type screw.
Figure 4: Remove Rear Screws
Using the hex screwdriver included in the battery kit, remove the two screws on the back of the device.
Figure 5: Rear Screws, Removed
Set the two screws aside. You'll need them again when we put the nuvi back together.
Figure 6: Use the Case Puller
The battery replacement kit includes a plastic case puller tool, shown above. You can also buy these separately. Insert the tool into the groove between the back of the case, as shown above, and pull up on the tool until the back of the case separates from the top.
Figure 7: Remove the Back of the Case
Use the case puller tool to pry apart the rear of the case, working your way around the case until the back is fully separated.
Figure 8: nuvi, Opened
Once you've managed to pry off the back of the case using the case puller tool, gently open the nuvi up as shown above.
Figure 9: Garmin nuvi, Opened
You'll notice two cables that connect the back of the case to the rest of the nuvi: a speaker cable, and the battery cable. Carefully disconnect both cables.
Figure 10: Garmin nuvi 765T, Opened
Now that the speaker and battery cables have been unplugged, there's enough room to fully remove the back of the case.
Figure 11: Remove the Original Garmin Battery
The rechargeable battery is held in place with some double-sided sticky tape. Simply pull the battery off the back of the case to remove it.
Don't discard it yet -- we need to save the double-sided tape and re-use it on the new replacement battery.
Figure 12: Get the New Battery Ready
Figure 13: Remove Tape from Original Battery
Peel off the double-sided tape from Garmin's original battery.
Figure 14: New Replacement Battery
Apply the tape to the top of the new battery.
Figure 15: Install the Replacement Battery
Put the new replacement battery into the back of the case, and give it a firm press to let the double-sided tape bond to the case.
Figure 16: Re-Connect the Wires
Plug the speaker and battery connectors back into the GPS (the wires are short, so you'll need to hold the case in a half-closed position to be able to connect the wires).
Figure 17: Re-Assemble nuvi Case
With the new battery successfully installed, the nuvi is ready to be re-assembled. Start at the top of the cass (the side with the power switch), and firmly press down around the edges of the case to snap it back together.
Figure 18: Re-Assemble Case
Take care that no wires are sticking out of the base of the GPS when re-assembling it.
Figure 19: Tighten Screws
Secure the GPS back together again by putting the two hex screws on the back of the case back together. The screws should be tight, but not over-tightened.
That's it! You've now got a band new battery that will hold a charge.