Why Do Batteries Run Out ? : āĻŦā§āĻāĻžā§°ā§ āĻāĻŋāĻ¯āĻŧ āĻļā§āĻˇ āĻšā§ āĻ¯āĻžāĻ¯āĻŧ ?
- A battery stores chemical energy. : āĻŦā§āĻāĻžā§°ā§āĻ¤ ā§°āĻžāĻ¸āĻžāĻ¯āĻŧāĻ¨āĻŋāĻ āĻļāĻā§āĻ¤āĻŋ āĻ¸āĻā§āĻāĻŋāĻ¤ āĻĨāĻžāĻā§āĨ¤
- Inside, chemical reactions produce electricity. : āĻāĻŋāĻ¤ā§°āĻ¤ ā§°āĻžāĻ¸āĻžāĻ¯āĻŧāĻ¨āĻŋāĻ āĻŦāĻŋāĻā§ā§°āĻŋāĻ¯āĻŧāĻžāĻ āĻŦāĻŋāĻĻā§āĻ¯ā§ā§ āĻā§āĻĒāĻ¨ā§āĻ¨ āĻā§°ā§āĨ¤
- Electrons flow through a circuit. : āĻāĻ˛ā§āĻā§āĻā§ā§°āĻ¨āĻ¸āĻŽā§āĻš āĻāĻāĻž **Electric Circuit**ā§° āĻŽāĻžāĻā§ā§°ā§ āĻĒā§ā§°āĻŦāĻžāĻšāĻŋāĻ¤ āĻšāĻ¯āĻŧāĨ¤
- Over time, the chemicals get used up. : āĻ¸āĻŽāĻ¯āĻŧā§° āĻ˛āĻā§ āĻ˛āĻā§ ā§°āĻžāĻ¸āĻžāĻ¯āĻŧāĻ¨āĻŋāĻ āĻĒāĻĻāĻžā§°ā§āĻĨāĻŦā§ā§° āĻļā§āĻˇ āĻšā§ āĻ¯āĻžāĻ¯āĻŧāĨ¤
- The reaction slows down. : āĻ¤āĻžā§° āĻĢāĻ˛āĻ¤ Chemical Reaction āĻ§ā§ā§°ā§ āĻ§ā§ā§°ā§ āĻāĻŽāĻŋ āĻ¯āĻžāĻ¯āĻŧāĨ¤
- When no reaction happens, the battery stops working. : āĻ¯ā§āĻ¤āĻŋāĻ¯āĻŧāĻž āĻŦāĻŋāĻā§ā§°āĻŋāĻ¯āĻŧāĻž āĻāĻā§āĻŦāĻžā§°ā§ āĻŦāĻ¨ā§āĻ§ āĻšāĻ¯āĻŧ, āĻ¤ā§āĻ¤āĻŋāĻ¯āĻŧāĻž āĻŦā§āĻāĻžā§°ā§ āĻāĻžāĻŽ āĻ¨āĻā§°ā§āĨ¤
Key Point: Batteries stop working when their chemical reactions finish.
āĻŦā§āĻāĻžā§°ā§ā§° āĻāĻŋāĻ¤ā§°ā§° ā§°āĻžāĻ¸āĻžāĻ¯āĻŧāĻ¨āĻŋāĻ āĻŦāĻŋāĻā§ā§°āĻŋāĻ¯āĻŧāĻž āĻļā§āĻˇ āĻšā§ āĻ’āĻ˛ā§ āĻŦā§āĻāĻžā§°ā§ āĻāĻžāĻŽ āĻā§°āĻž āĻŦāĻ¨ā§āĻ§ āĻā§°ā§āĨ¤