SteriPEN Sidewinder Battery-Free UV Water Purifier in See Photo
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Item #5188X

SteriPEN Sidewinder Battery-Free UV Water Purifier

$64.95 Compare at $99.95 Save 35%
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Most Helpful 5-Star Review

Reviewed by Mountain Goat from Alabama on Sunday, December 23, 2012
I have used the battery operated version of Steri Pen for several years while hiking- works great. I like the idea of this unit not requiring batteries. You do have to crank it fairly fast- if you're too slow, the red light blinks. When 90 seconds is up, green light comes on and you're good to go. I... Read More
Based on 15 reviews: Overall:
Information about 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.
  • Tested by the Water Quality Association (WQA) against the US EPA Microbiological Water Purifier Standard
  • Received the WQA's Gold Seal, certifying that SteriPEN purifies water safely and effectively
  • Purifies a liter of water in 90 seconds
  • Kills 99.9% of bacteria, viruses and protozoa
  • Indicator lights flash green and autotimer tracks 90 seconds of hand cranking
  • Battery-free design is perfect for camping or water emergencies
  • Includes 1-liter BPA-free water bottle and pre-filter for removing particulates
  • UV lamp is effective for 8,000 treatments
  • Made in China
  • US shipments only
Specs about SteriPEN Sidewinder Battery-Free UV Water Purifier
  • Weight: 1 lb. 8 oz.
  • Material: Composite
  • Dimensions: 9X5X3-1/2" (HxWxD)
  • Made in China
  • US shipments only

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Most Helpful 5-Star Review

Reviewed by Mountain Goat from Alabama on Sunday, December 23, 2012
I have used the battery operated version of Steri Pen for several years while hiking- works great. I like the idea of this unit not requiring batteries. You do have to crank it fairly fast- if you're too slow, the red light blinks. When 90 seconds is up, green light comes on and you're good to go. I... Read More
Based on 15 reviews: Overall:
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  • Reviewed by Johnny the Hiker from New Mexico on Thursday, March 27, 2014
    Since this item was purchased for an emergency situation there is little I can say except if it works as described I will be very happy during that emergency that has not happened as yet.
  • Reviewed by K from Idaho on Tuesday, March 04, 2014
    Who needs batteries. This has a built in generator to power the electronics, which is perfect for those times when you need sterilized water and need to save your batteries for other items (may it be while camping for extended time, or during emergencies). I purchased two of these and tested them both. They both worked without any issues.

    As for the ability to crank these things for the 90 seconds, I had no issues. Let me tell you why...
    At first, I cranked it as shown in the video. This would be with the crank on the side and my entire arm moving the crank (should and elbow joints moving). This did become a bit tiresome quickly. Noticing this, I rotated the unit so that the crank was directly facing me. I then rotated the crank so that only my elbow join was moving. This was much easier to crank (using a stronger muscle) and I was easily able to finish cranking through the 90 seconds and also do another liter of water for another 90 seconds. For people struggling to crank through the 90 seconds, try rotating the unit and crank it from the end.

    I recommend this to everyone.

    Now my only small issue is that the bulb is good for 8000 usages, after which I cannot purchase replacement bulbs. The company will not sell them because they claim a special technician is required, so you must send the entire unit to them so they can replace it for you at $20 plus shipping (cost at the time of writing, may go up or down). I am an engineer/electrician for trade and am sure I can replace the bulb myself. Still, I cannot purchase the bulbs as they won't sell them to me. My guess is that they are holding onto an extra way to make more money.
  • Reviewed by steelbj from LA on Monday, August 12, 2013
    It's very hard to get GREEN LED.
  • Reviewed by HikingSierra from california on Tuesday, July 09, 2013
    I bought this from STP at least 6 months ago and never used it until this week, when I broke it out to test it in advance of an upcoming trip. Well, even after reading the instructions, following them to a T, and even having a friend try it, I could not get it to work. Even after the prescribed 90 seconds of fast cranking (which is harder than it sounds) the green lights showing the water was purified did not come on. I have returned it to SteriPen.
  • Reviewed by Barefoot Grandma from northwest indiana on Sunday, June 23, 2013
    As reported in other reviews, it takes some work to get to purification level, but it can be done! The trick is to keep going for 90 seconds no matter what, set a timer so that you go the whole way, and like magic it releases and is done at exactly 90 seconds. I am a 66 year old woman and was able to do it once I learned the trick. My only complaint is that the regular water bottle top leaks like crazy. I am going to write to steripen about it and see if I can get a new top or bottle replacement.

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