»BEST SOLAR PERFORMANCE! Highly effective solar panel, supports Quick Charge, USB-A, and USB-C. While the Sandberg power bank's capacity of 8,780 mAh isn't exactly high, its foldable solar panel is all the more efficient. After just four hours in direct sunlight, the battery is almost fully charged. Other solar power banks typically only achieve single-digit percentages in this time. The 800-gram solar power bank is fully charged in almost four hours via cable—in an emergency, it can also be discharged during this time. Devices are connected via the two USB-A ports or USB-C. While the 18-watt output is too low for laptops, the Sandberg power bank does support Quick Charge and USB Power Delivery.«

»TEST WINNER! The Sandberg Solar Charger 21W impresses with its large solar panel, good solar charging performance, and high-quality workmanship. Thanks to its robust construction and splash-proof design, it's the ideal companion for all activities that take place far from power outlets.«

»I have to say the first impression is very good. The workmanship has been meticulously implemented and the five-year guarantee speaks for Sandberg A/S again.«

Komputer for Alle:

»Sandberg Solar Charger is the most efficient powerbank with solar charging we have tried. The test shows that it is possible to charge the power bank in the course of a day using the sun's light.«

Tech for Techs:

»This is really good going!«