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Toss the iodine tablets and step up to the most advanced water purifier in the world-the SteriPEN Ultra. The Ultra keeps track of battery status, treatment success, and number of uses and tells you with an easy-to-read high-contrast OLED display. The internal battery is rechargeable via a computer, a standard wall outlet, or SteriPEN's portable solar panel (not included) for up to 8,000 liters of water.