1. Hurray for Batteries! Energy – It’s Everywhere!

2. 2 Where can we find batteries? In most of our favorite gadgets: Watches Flashlights MP3 Players Cell Phones Computers Electric/Hybrid Cars Many, many others… If you remove the batteries, these gadgets won’t work.

3. 3 Electricity from a Battery Batteries provide electrical energy The energy comes from a chemical reaction A complete circuit is required

4. 4 Energy Stored in a Battery Battery design stores energy. Metals are separated to slow flow of electrons. When connected to a device, electrons can flow.

5. 5 Where’s the Chemistry? Batteries are made of two different metals. Electrolyte surrounds the metals. A chemical reaction occurs. Electrons flow from one metal to the other. In batteries, chemical energy is converted to electrical energy

6. 6 Primary and Secondary Batteries Primary batteries (disposable batteries) are designed to be used once and thrown away.. Secondary batteries (rechargeable batteries) are designed to be recharged and used multiple times.

7. 7 Battery Sizes - AAA to ME8Z Batteries come in all shapes and sizes. The chemical reactions power our favorite things.

8. 8 Electric/Hybrid Cars All Electric cars run on batteries only. Hybrid cars use gasoline and batteries. Batteries are used to store electricity when power plants are not available. Industrial Storage