Our iPads and iPhones make great travel companions. They offer quick access to step-by-step directions, public transport information, restaurant recommendations, and email on the go - and as a result, they tend to spend more time in our hands than in our pockets or bags. But how can you avoid running out of power? We've heard a lot of conventional wisdom about how to keep iOS devices charged and ready. To separate fact from fiction, Macworld Lab grabbed a fourth-generation iPad and an iPhone 5 and started charging them, draining them, and timing different tasks and scenarios. Here's what we discovered.
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