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by Leo Jakobson | May 12, 2014
As electronic devices proliferate and smartphones become central to people's professional and social lives, back-up battery chargers are becoming more and more common of briefcases, backpacks, purses, and glove compartments.

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The Tumi Mobile Power Pack is engineered to be compact, efficient and powerful -- a reliable tool for hassle-free charging of cell phones and other USB devices. With sufficient power (5,000 mAh) for two to three charges of most smartphones, and two power ports, the Tumi Mobile Power Pack can charge two devices at the same time. It is designed to work anywhere in the world. This kit includes the power pack, USB/USB micro power cable and a protective ballistic carrying case. It sells for $145. It is available from Tumi Special Markets