Small help needed with HP 40GS Graphing Calculator

lazygarfield
Tue, 28 Sep 2010 19:32:31 +0000

Hello,

I recently bought an HP 40GS Graphing Calculator (pic below).



http://gfxbucket.net/images/2809201002.jpg



In the box of the calculator, this battery/cell/whatever came -



http://gfxbucket.net/images/280920yty.jpg



Now, what I want to know is… do I have to insert this into the Graphing Calculator? Or is this a backup cell and the calci already contains one? And if I do have to insert it… then where do I have to insert it?



http://gfxbucket.net/images/2809201003.jpg



The calci has this area for inserting the AAA cells and the small rectangular lid-like thing on top of the 4 cells is most probably where this goes… however, I am unable to open it. Any help?