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I recommend this panel when coupled with a battery pack. The panel is a nice addition to my gear list on backpacking trips that extend beyond just a weekend.
I bought this to charge my charging banks on a 2-week backpacking trek in New Mexico. Overall, I was happy with the effectiveness, though it was not as good as I had hoped.
Gente o produto funciona mesmo, com um dia ensolarada demos carga em 4 celulares das pessoas do grupo!! Prtico e valioso em um acampamento sem energia eltrica.
This is a great solar panel. I just used it on the JMT and it worked better than I needed it to.
I've gone through 8 or 9 of these backpacking panels. This one puts out the most current at half the weight of the next-best panel. Easily getting .72A at 4.85V under California sun. There are two types, one with hot glue and a red LED you can't see. The other uses electronics/white adhesive which actually works and employs a blue red. Both work well, just use epoxy to re-glue the red-led version (and drill a hole so you can actually see the hidden red led).