One of the best things about going off the grid is waving goodbye to your inbox. But you may still need your phone for calls or taking photos. The Universal Waterproof Solar Charger can keep you powered through any outdoor adventure. This rugged 5,000mAh battery has a built-in solar panel, and adapters for iOS and Android devices. You can grab the charger now for just $13.99 at the Popular Science Shop.
If you fill the charger before leaving home, it will charge your smartphone twice over. Even when you exhaust this supply, the solar panel keeps soaking up power. This means you should always have some reserve power for GPS maps and emergency calls on your phone. With two USB outlets, you can actually charge two phones at the same time.
The charger’s rugged design is shockproof and waterproof, with a mountaineering clip included. This means you can hang the charger on your backpack—ideal for picking up sunlight. Along with phones, you can charge tablets, GoPro cameras, and most other USB devices.
It’s normally $49.99, but the Universal Solar Charger is now just $13.99 with a choice of four colors.