Review on 🔋 WISSBLUE Solar Panel Charger 21W 60W: Fast, Dual USB 2.4A 4.2A Portable Charger for Travel, Camping, Emergency Backup - Compatible with iPhone, iPad, Samsung, Kindle, and More by Predrag Holman

Arrived on time and started testing. The first day was cloudy: poor results but the devices were still charging. Today is a bright sunny HOT cloudless day. Hanging on an elastic cord outside our door, it glows GREEN and charges both the smartphone and USB charger! Used in a moving car on the Autobahn and although it will stop charging when driving under an overpass it will charge! Already considering buying another one! The currently connected smartphone will be charged to 19% in 20 minutes in bright sunlight with NO shadows/clouds