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External USB Batteries

Reviews > Travel > External USB Batteries
The Best External USB Battery Review
The Best External USB Battery Review
Which external battery is the best to power your USB devices such as a cell phone, camera, or other devices? To find out, we selected nine of the top rated and most popular models to find out how they compared in side-by-side tests. We used them them on planes, road trips and around the office and r...
- Read the full best-in-class review on OutdoorGearLab.com >
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We believe the best gear reviews are those that objectively compare and contrast. To that end, we partner with our sister site OutdoorGearLab.com for gear review information. OutdoorGearLab was launched in July 2011 as a spin-off of SuperTopo's gear review section, which originally was exclusively focused on climbing gear, and expanded over time to include general outdoor activities such as camping, hiking, and more.