Lauren N.wrote a review of Goal Zero Sherpa 40 Recharger on August 23, 2019
Familiarity: I've used it once or twice and have initial impressions
It’s my fault for assuming that this would be small enough to be appropriate for backpacking, but it’s actually pretty huge. The previous charger I purchased from this company was about the size and weight of a deck of cards. This one is about the size of an iPad. It’s clearly not intended for backpacking. I might keep it for other travel purposes, but I was really disappointed it won’t fit in my pack.