SunJack 25W Solar Charger Portable Solar Panel with USB for Cell Phones, Tablets for Backpacking, Camping, Hiking and More

i saw youtube reviews claiming 16w out of 25w from thie pannels, and i taught thats good enough, but the most i get is 10.4w so dissapointed, i should have bought the 15w smaller pannel instead since 10.4w is soo little for the size in my opinion

I only tried it once to charge a 20k mAh power bank and it didn't take much time at all to fill it up from 70% to 100%. I don't remember exactly how much time it took, but i think its was around 40 minutes. The experiment was done in an almost clear sunny day. The main reason for getting this product is emergency situation, and it combines the perfect power, and the perfect weight and quality to be used in those kind of situations. I'm very satisfied with this purchase.

I have this SunJack panel hanging indoors underneath a skylight, and on an overcast day, the meter reading is 5 volts, about .50 amps, and about 2.25 watts. So yes, it works, and it's pretty fantastic, because I can charge my small devices indoors during the day.

well made , and charge very fast under the sun

Using other to charge up my powerbank. Good sunny day without cloud, charging would be fast. Cloudy day would be slower. Takes about 3 good day to fully charge my powerbank.

This is a most handy piece of equipment. We set it in our windshield while driving or clip it on my backpack if we are overnight hiking and we always have extra power. It charges quickly in the windshield. Charge times while hiking are longer due to the angle at which the panel hangs, however if we are hiking all day it will still get the job done. If not we simply lay out the charger in the sun once we have stopped. You can buy the entire set up with two battery packs or just the charger and the battery pack separately. When we bought it was actually cheaper tpo buyu the components separately so check before you buy. This was my second purchase of this item. The first worked perfectly but got left in a rental truck and "disappeared". I had no hesitancy buying this a second time. Highly recommended.