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iPhone battery draining fast right after an update

Your iPhone is reindexing Spotlight and rebuilding its system after the update. This drains battery for 24-48 hours while it works in the background. Wait a day or two. The battery will return to normal once the reindexing finishes.

When you update iOS, your iPhone rebuilds its system index in the background. This process, called Spotlight reindexing, uses a lot of power and makes the battery drain faster than normal. It finishes within 24-48 hours and battery returns to normal. You can speed it up by letting the phone charge overnight, or turn off background activity while waiting.

Risk: Low ⏱ 24-48 hours for reindexing to finish Beginner
⚡ Before you start
  • Keep your charger nearby for the next 24-48 hours
  • Avoid using the phone intensively while it's reindexing
  • Plan to charge it overnight to help the process finish faster

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