what is the button and the lights for on the battery

QA Rechargeable Battery 13" MacBook

QA Rechargeable Battery 13" MacBook

Product No Longer Available

2 Answers from the Community

  • Best Answer:

    The button and lights are to see how far your batter is charged. This is for if you're MacBook is off, or if it is charged some other way.

  • By pressing the button the lights illuminate to show how much the battery is charged.