This is exactly what I was looking for: a solar charger sufficient to charge a phone/extra battery, waterproof, small and comes without a battery pack. I agree with other users on how much power it puts out, but it's enough to charge a 5000mAh battery, which is all I wanted. As for the size, it's not a "paper" format, it's A5, or in American half a sheet: 8.5 x 5.5 ". It's better finished than I expected, with rounded corners and without sharp edges Edge makes it easy to clip in. Overall, a perfectly simple device that avoids all of the pitfalls that seem to be the bane of overthinking all other solar chargers, which means it also weighs 2.8 ounces!Nothing fancy: just the basics.
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