SteriPen Freedom Solar Bundle The smallest, lightest handheld UV water purifier making it great for international travel. Purifies a half-liter of water (16 oz) in 48 seconds. Bundle has everything you need to hit the road - storage battery/solar charger, USB cable, international AC adapters, and half-liter water bottle. USB rechargeable - no batteries needed. Power up via wall outlet, computer or USB compatible solar charger. Full charge lasts for 40 treatments. Award winning - recipient of American Alpine Institute Guide's Choice Award, Men's Journal Gear of the Year and About.com Readers' Choice. Fast, safe, effective and chemical-free. Doesn't alter taste, pH, or other water properties. Lamp lasts for 8,000 treatments.