I have that exact charger - it weighs too much (IMHO) for distances. Run a search on Amazon for Jackery Bars. I have one of those also and they offer multiple sizes. The smallest will give you 1-2 charges, the medium 2-3 and the large 4+. I have the large and it weighs a little more than the Anker. The medium might be enough from a capacity standpoint and it may save you a few ounces...
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