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 Becky Evans

We have been using this panel for a few months now and are very satisfied. I typically use lots of batteries to charge various items including phones, tablets and other random items around the house. So I use this to charge most of them during the day. I live in upstate New York and wouldn't say we have the most solar power, but I can typically fully charge two 6-10,000mAh batteries in a day or so while sitting on my car's dash while parked. a lot during work. So far it has been very durable and very reliable. I didn't trust the waterproof test, so I can't confirm this feature. My only criticism concerns the maximum power of the panels of 28W. With a maximum voltage of 5V for a total current of 4A, both ports only get 20W of charging power, not 28W. I got just over 12W when using a single charging port. I would definitely go back though.