You should just be able to unscrew the back of the key. if not the dealer has a tool to take them apart.
To change the battery in a Porsche key, first remove the emergency key and the cover on the back of the key housing. Change the battery and replace the cover and emergency key.
remove the manual key then remove the top of the key and replace the two batteries cr2025.
Remove the valet key from the fob and behind it is a small Phillips screw. After that the fob will split and the battery is visible.
How to remove battery cover to replace battery
In order to replace the battery you will have to remove the old one. Once you do that you will see exactly the battery you need.
How do you replace a key battery on a 2004 Saab 93
Remove the seat. Remove the battery. Replace the battery. Replace the seat.
You just need to remove the back cover, it does require using a paper clip to release the back and replace it with a watch battery. You can get a watch battery at any pharmacy.
Remove - battery cable Remove + battery cable Remove hold-down bolt on front bottom of battery tray Remove battery
Changing the battery in the key fob to a Pontiac Solstice is pretty simple. Just remove the back of the key fob, and take out the old battery. It takes a hearing aid battery, and they can be found at any chain pharmacy. Put in the new battery and replace the back to the key fob. It is now ready to go!
First a person would have to buy a replacement battery for this item. Then remove the face, remove the white plastic with a screwdriver, remove the screen, remove the battery, replace the battery, and put everything back on where it belongs.
Open the key case with a jeweler's Philips screwdriver. Remove the back cover. Use the Philips driver to remove the two screws that you now see. Remove the battery cover. My key uses a button battery: CR 1616. Note tyhe battery you need and buy a new one (RS store is a good place). Use a jeweler's flat blade to lift the battery up and slide out. Replace with a new battery and reassemble.