Perfect for travelers visiting areas with questionable water quality, the SteriPEN Freedom is designed to be carried easily in a shirt pocket or purse and comfortably used in even fine restaurants. With an internal, USB rechargeable battery, Freedom treats 40 half liters of water on one charge.

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Weighing in at only 2.6 ounces, Freedom is the world’s smallest, lightest UV water purifier. It is compact, lightweight and easy to use. Perfect for travel, the SteriPEN Freedom is designed to be carried easily in a shirt pocket or purse and comfortably used in even fine restaurants. Freedom treats 40 half liters of water on one charge.

Water is safe to drink in just 48 seconds. So easy to use, just remove cap, place Freedom’s UV lamp in water and stir. The built in water sensor controls the illumination of the lamp and when the timed treatment is complete, the lamp turns off. Proven to be safe and effective, eliminating over 99.9% of bacteria, viruses and protozoa that cause water-borne illness.

Contents: SteriPEN Freedom, carrying case, USB cable, and user’s guide. Three year limited warrantee.

Product Specs
Weight 2.6 oz
Dimensions 5.1 x 1.4 x .8 in
Lamp Life 8,000 treatments
Battery Internal Lithium-Ion (Included with purchase)
Battery Life Full charge treats 20 1 Liter treatments or 40 1/2 Liter treatments
Minimium Bottle Diameter 30mm (1.2 inches)
Filter Compatability Non-Tapered End (FitsAll Only)
User Guide en | fr | es | de
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We have cycled thousands of kilometers, from the United States to El Salvador and we have used our SteriPEN Adventurer Opti every day while riding to purify our drinking water.
Nico El Salvador
Andrea Rees
Loving my Freedom @SteriPEN, what a difference and that's just in Paris & Nice so far! Love that I can get clean water anytime, anywhere.
Andrea Rees Paris, France
Lea Conlon
During our 5 week Hugging the Coast Kayak Expedition (research on seaweed) in northern Sulawesi, Indonesia we use used our SteriPENs every day! 
Lea Conlon Indonesia

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FAQs for Freedom

Q: Are the USB adapter and AC adapters included with Freedom?
— Asked on January 17, 2014

This question has not yet been responded to.

Q: What voltages of power does Freedom charge from?
— Asked on January 17, 2014
A: The SteriPEN Freedom charges anywhere between 100V and 240V.
Q: How large must the bottle opening be to use the SteriPEN Freedom?
— Asked by Lori on February 18, 2014
A: The minimum bottle diameter to use the SteriPEN Freedom is 30mm (1.2 inches). In smaller bottles the sensor pins will not properly enter the water. For safety reasons, if both sensor pins are not sensing water, the UV lamp will not turn on.
Q: My Journey malfunctions intermittently with a flashing unhappy face circle and unhappy face battery display. Sometimes it works OK and sometimes it gets set up with the 1L indicator but as soon as I put it in the water the unhappy faces come up. What's the story here? Thanks, Nat
— Asked by nat crosman on April 12, 2014
A: Hi Nat, The reason for the unhappy face when you place the Journey in water is dependent on where you are seeing it. If you don't have the User Guide that came with your SteriPeN, you can find it here: Please feel free to contact our customer support department at [email protected]
Q: I've loved my SteriPEN Adventure Opti for about 2 years, but have only used it about 30-40 times. When I started use this year, it responds as normal with a green light, then flashing green as well as flashing LED next to the UV light. The UV light doesn't seem to be lighting though. How can I verify it's working? What manufacturer warranties are on my pen?
— Asked by Micah Christiansen on April 14, 2014
A: Hi Micah - The indicators you describe sound like your Adventurer Opti is functioning normally. If you need no longer have your User Guide and need help remember the how the indicator lights work, you can find a copy of the instructions here: For safety reasons, the UV light will not turn on until it is placed in water. If you are unsure that it is lighting in water, we recommend placing it in a clear glass, possibly dimming the lights so that the light from the lamp is easily observed. If then you believe it isn't on, please contact our customer support department at 888-826-6234. Your SteriPEN comes with a 3-year warrantee and we are here to help!

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