Energizer

Pronunciation: /ˈɛnərˌdʒaɪzər/

Energizer (noun)

  1. A device that gives power to something, especially a battery-powered item.
  2. A person or thing that makes others feel more active, hopeful, or motivated.
  3. Something used to help people feel more energetic during exercise or training.

Examples

  • The energizer powers the device when the battery is low.
  • This energizer helps the gadget keep running longer.