Review on Nekteck 28W Foldable Portable Solar Charger with 2 USB Ports - IPX4 Waterproof Hiking Camping Gear Sunpowered Charger for iPhone 12/11/11pro/Xs, iPad, MacBook, Samsung Galaxy, Camera and more. by Valerie Jones

I first tested this product for about two weeks. I charged a power bank during the day and used the power bank with the wireless charger at night. Each USB can put out around 7 watts during the daytime peak. Using only one USB will not speed up charging. I had trouble charging on cloudy days. I was doing it just for fun until a derecho came to my town. 97.5% of my county had no electricity. There is currently no electricity in my house. I no longer use wireless tablets because I need maximum efficiency during this disaster. I have four power banks. Every day I change the two batteries I use. Constantly charged from 3 to 5 phones. I love this solar panel. Must get. You never know when you'll need it.