Fact 1: Abattery converts chemical energy into electrical energy.

Fact 2: Duracell batteries now come with a tester built into the package.

Given the two facts above, answer the question "what converts chemical energy into electrical energy?" with the following options: 
- guns
 - engines
 - Firecrackers
 - cigarettes
 - Duracell
 - organ
 - heat
 - Cars


 

     Duracell    