SteriPEN Sidewinder Battery-Free UV Water Purifier

Closeouts. SteriPEN's Sidewinder battery-free UV water purifier is ideal for travel, camping off-the-grid or emergency situations. It uses a hand crank to power a UV light that purifies a liter of water in 90 seconds.

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Verified Buyer Reviewed by jdub from Ann Arbor, Mi on Tuesday, January 29, 2013
Yes, it takes work to crank, and works as advertised when cranked correctly. But it does not use a battery at all, and is a great back up.
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