just a warning that their are a few safety risks when it comes to cutting open a batery that contains toxic acids and chemicals.
as a safety precaution i wore safety glasses.
to do this i first attempted to cut is with an X-acto. I found that ineffective so moved to filing the corner down, while trying my best not to scratch up the battery to much.
Once i had filed it down a bit i used the knife and pliers to carefully remove the flap, exposing the edge of the top cover.
To do this I just used a wood carving chisel to stick under lid and pry it loose. then carefully remove it by sliding it out the side you opened.
First remove the piece of card board from the top to expose the six cells.
Then carefully remove the cells by cutting them free from each other and pulling them out with pliers.
simply stick it in place with some glue.
And PRESTO no one will suspect a thing from an innocent battery.
its good for storing anything from money to your special herbs(Like Basil) :P.
bills can fit simply by folding them in half along the long side and rolling them up.
Just make sure no one throws it out thinking it actually is a dead battery.