Of course, leaving a smartphone's display on for multiple hours as you traverse Montana, Wyoming, Idaho, Oregon and California isn't wise without a power source to sustain that type of abuse, so it's worth mentioning that I traveled with an AC inverter in order to keep a constant power connection to the Lumia 900.

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In my battery test, where I keep the screen at 75% brightness, leave the Internet connection on and email collecting in the background and play videos back to back, the Nexus 7 lasted 10 hours and 44 minutes.

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Rain-Slick Precipice 3 is a throwback to the classic 16-bit era and runs smooth without any kind of connection, so keep it on hand when you find yourself in one of those dark pockets of the world.

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