Review on 🔌 Solar Panel Charger - JOYJOM 21W, Portable Solar Charger with 1 USB Port (5V) and 1 DC Port (18V), Waterproof & Durable. Compatible with iPhone, iPad, Galaxy, Portable Power Station 100wh, and More! by Theodore Huynh

Every bug bag needs a solar charger. This one has a good solid build, folds up nicely and has already charged my phone and a couple of flashlights. Test - Charge things up in a very sunny room, measure the amperage of the USB connection. It seemed to stay above the amp the whole time. As expected, it changed a lot as the sun moved and clouds came and went. Regardless, perfect. That's exactly what I need.