The latest version of its Apple's mobile OS seems to make iPhone and iPad batteries lose juice faster than before. Mark Sullivan investigates and suggests a fix.

At a Glance

  • Apple iPhone 4S - 64 GB - White Cell Phone - AT&T

  • Apple iPhone 4S - 16 GB - Black Cell Phone - AT&T

  • Apple iPhone 4S - 32 GB - White Cell Phone - AT&T

  • Apple iPhone 4S - 16 GB - White Cell Phone - AT&T

  • Apple iPhone 4S - 32 GB - Black Cell Phone - AT&T

  • Apple iPhone 4S 32GB Black

    See it
    on Amazon

  • Apple iPhone 4S - 64 GB - Black Cell Phone - AT&T

  • Apple iPhone 4S 64GB Black

    See it
    on Amazon

  • Apple iPhone 4S family

  • Read PCWorld's review
Related:
  
Shop Tech Products at Amazon