Jewelers flat head screwdriver (anything that will pry the battery open will work)
An unsharpened pencil
Step 1: Pry Open the Top of the Battery
Be careful not to slip and cut yourself. Take your time.
If your impatient and cut yourself with a dull screwdriver because you were rushing, YOUR NOT GOING TO HAVE A GOOD TIME!
Seek medical attention immediately!!!
Step 2: Remove the Top of the Battery
I used a small pair of pliers to expedite this process.
Be careful not to bend or break the top piece of this battery that you are removing.
Step 3: Take Out the Contents of the Battery
I used an unsharpened pencil to help push it out through through the other end as depicted.
Step 4: Tape It!
Step 5: Tape the Top Piece to the Shell
Do not tape both sides because you need to be able to open and close your compartment to hide your belongings...
Unless you really want to because you're just doing all of this to make some weird christmas ornament or something.
Go right ahead and good luck with that. I don't judge.
Step 6: Stash Your Cash!
Step 7: Close It Shut!
It's not going to look perfect but it will make your compartment harder to notice...it'll be hidden anyway.
If your secret compartment is discovered, closing it shut will make it extremely difficult for someone who doesn't happen to have pliers to get to your belongings. Even if they do have pliers they probably won't care because they won't know whats inside.
If they do have pliers and they know what you hid from them, YOLO... you tried!
Step 8: Hide Your Secret Battery Compartment in a Secret Location!
Or you can replace your battery into the package you bought it in.
All you need to do is tape the package back up.
You are now ready to hide any valuables that will fit in your new state of the art secret battery compartment.