Aukey 21W Solar Charger, $40 with code AUSOLAR3 | Aukey 28W Solar Charger, $48 with code AUSOLAR4

Whether you like to spend a lot of time outdoors, or just want to be prepared for extended power outages, these Aukey solar chargers can juice up two USB-powered devices at once using nothing but the sun. Just choose your wattage, and be sure to note the promo codes.