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.

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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 32GB iPhone 4S

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

  • Apple 64GB iPhone 4S

  • Apple iPhone 4S family

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