Aukey 14W Solar Charger, $35 with code M6G5ECT9 | Aukey 21W Solar Charger, $42 with code K9AEFOBH

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. Unless space is a concern, I’d personally opt for the 21W model for $7 more.