THIS PROCESS IS LIKELY TO VOID ANY WARRANTY YOU MAY HAVE AND REQUIRES CARE TO SUCCESSFULLY COMPLETE! This process involves completely removing the guts of the unit and disconnecting components that are not intended to be user serviceable. Do not blame me for any issues that may arise. This instructable is intended to provide information I was previously unable to find on the disassembly of the unit. It currently discusses, but does NOT show the replacement due to issues discussed later on.
Step 1: Tools and Supplies
--> You will need a small Phillips head screw driver. Unfortunately I don't know the specific size, but it came in a cheap set of precision screw drivers I had. It should be fairly easy to come by.
--> A flat bladed screw driver or other prying device.
--> Double stick tape. This is used on the back cover and to hold the battery in place.
--> Regular tape (scotch brand style)
--> Refridgerator magnet. It will help to hold the small screws so they don't get lost. I learned this trick from my time as a fencing armorer. A piece of the double stick tape will work as well, but is not reusable.
--> A replacement battery. Discussed more in the last step.