It was almost 207 years ago that the first battery was developed by Italian physicist Alessandro Volta.  For the first time, electricity could be gathered and stored, instead of just being handled as a static shock.  So the next time you open your laptop, listen to your mp3 player, or pick up the TV remote controll, remember that the battery started with Volta.

http://www.wired.com/science/discoveries/news/2008/03/dayintech_0320

And. here’s a list of some common things we use all the time that depend on batteries :

Bluetooth devices
Cars
Cell Phones
Cordless power tools
Digital watches
Digital cameras
Flashlights
Laptops
MP3 players
Pacemakers
PDAs
Telephones - non-cell (Early phones used batteries to keep the phone line voltage up.)
TV Remotes

Okay, so its not the best list ever, and without batteries in general, we wouldn’t have made nearly as many advances in electrical technology as we have today.
As usual, if anyone has any other good ideas/strange places that we find batteries, feel free to leave your ideas in the comments so I can add em to the list.