Verified Buyer Reviewed by Climbhigh from NJ on Monday, September 14, 2015
This is the original model of the SteriPen Classic and treats only 3000 liters of water.The substantially upgraded model, the Classic 3, operates on four AA batteries batteries. With one set of alkaline batteries, the Classic 3 purifies up to 50 liters or supercharge your Classic 3 with lithium batteries and treat up to 150 liters. It has a lamp life of up to 8,000 liters. The reviews on the Sierra site are confusing as from the descriptions I think the reviews are from all the SteriPen models they sold over the years. I hiked, backpacked and toured through many countries and would always want the best purification system available.
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