Mathewwrote a review of Goal Zero Sherpa 40 Recharger on September 12, 2019
Familiarity: I've used it several times
The Goal Zero Sherpa 40 is perfect for my backcountry adventures. It fits nicely in the lid of any multi day pack. I use my phone as a map/gps, tracker, and camera while I am in the wilderness and the Sherpa 40 keeps is going. You can charge via a wall charger or solar panel. It’s doesn’t add too much weight to your pack and can be used to charge any other usb item. Won’t leave home without this when I am headed into the backcountry!