Road warriors' essential mobile toolkit

What you should always carry in your briefcase or backpack -- or on your mobile device itself
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Mobile's little helpers

Smartphones and tablets let you do more things in more places, but they often require a little help. If you travel a lot, you'll need to bring some of that help along, such as charging blocks and audio cables, to make the most of your mobile device in alien territory. The following are my picks for what you need for your iOS and Android devices, including specific tools I work with all the time and advice on using them for optimal effect.

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