You are presented with the question "what converts chemical energy into electrical energy?" and the following answer choices: 
- guns
 - engines
 - Firecrackers
 - cigarettes
 - Duracell
 - organ
 - heat
 - Cars

Now knowing that abattery converts chemical energy into electrical energy and duracell batteries now come with a tester built into the package, choose the best answer.


 

     Duracell    