The SP-6000 Ultimate Solar Charger flips open to reveal two 6-watt solar panels for 12 watts of charging power.
A built-in 10,000-mAh lithium battery can charge an iPhone five times, and a waterproof pouch protects the phone while it charges. Charging time is seven to eight hours in direct sunlight. Features include two USB ports, a water-resistant design and an adjustable support for the solar panel. $129. Secur Products, Edison, New Jersey, (855) 452-8388. securproducts.com
This article originally appeared in the October 2016 issue.