Storing Batteries and Flash Cards

In my Crumpler bag I was wondering if I can store both a spare battery and Flash cards (in a case) in the same pocket in the lid or will the battery cause electrical damage to the Flash card and will also storing my cell phone in the same pocket as a battery cause damage.

You shouldnt have any problems storing any combination of those items together. I regularly store my CF cards right next to my batteries at home and when Im out all three (including the cell phone) are next to each other.