How do you open a Mazda RX-8 Smart Card (Keyless Entry) without breaking

[AaronB]

it to change the battery? I have a keyless start and entry for my 2006 RX-8 and my Smart Card's battery is failing. However I am not someone with a lot of fitness and fear breaking the thing to see what battery it has to replace it.

So I was wondering if their was some trick to opening it up or guide so I can go about it without breaking it apart.

THANKS!