43 Flips | 4 Magazines | 15 Likes | 9 Following | 3 Followers | @Zwischendurch | Keep up with Zwischendurch on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “Zwischendurch”

The Best USB Battery Packs and Power Banks

Over the past two years, we’ve considered nearly 300 USB battery packs (also known as power banks) and spent hundreds of hours testing more than 40 …