I like Lander Cascade Power Bank for a few reasons. First, though it is small, I can get two full smartphone charges out of it. I often use my iPhone as a camera and as a GPS tool on river trips, and being able to recharge lets me keep shooting without worrying about having a dead phone when I get to the takeout. Second, it’s durable. The Cascade Power Bank is cased in rugged metal so I’m not worried at all if I drop it or if I just throw it in a bag with a bunch of other stuff. This is not a fragile piece of electronics. Click here for more.
Charge on the Go: Two Portable Power Banks