Reviewed Here: https://youtu.be/cgC0qKeI81M
If You’re looking for a nice compact solar battery bank you can take backpacking, this one will do nicely. However, a solar cell of this size is simply not powerful enough to be a full solar charger. It will give you one full charge plus 20-60min of phone power a day. The Weather-Proofness is a bit inadequate but will protect somewhat.
I put it to an honest test and have concluded that it performs well for such a small cell.
Most people don’t fully understand that getting useable power for charging out of a single solar cell is no small task. These cells put out maybe a watt and a half on a good day. I tested by putting in direct sun(angled toward the sun) at a point where the sun would clear an obstruction at exactly the same time every day and hit the panel with full sun. total sun time per day was approx 6hrs. After 4 days, I was up to the second power bar. I was originally unimpressed by this.
Then I began depleting back down to 0 power and the point that it would not turn on and charge anything unless pointed directly at the sun. It took over 3 hrs from the second power level, charging a Samsung Galaxy S5 and an Earson BT Speaker both connected streaming netflix.
I further tested by trying to power a phone that would not turn on with the charger that would not stay on unless pointed directly at the sun. I was actually able to make a phone call.
As Far as the Weather Proofness; it is not. While there are rubber flaps to shed water, they don’t seal completely and there are large holed behind the rubber bumpers. See video for more details.
So the conclusion is: This thing is worth taking on a backpacking trip for light daily or emergency use and works well as a Battery Bank, but is not a full blown solar charger.
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