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battery backup

  1. iamsaifkhan

    iPhone 11 Turn off auto-rotate saves battery

    if i turn off auto rotate will it save battery?
  2. R

    iMac Pro iMac Pro running on UPC warning (Battery Backup)

    Every now and then I get a warning that my iMac Pro is running on battery backup. The screen dims for a moment then it goes back to normal. The house lights never flicker and nothing else appears to be affected. I was wondering if this is normal for all UPCs or is my unit is faulty and...