BioLite SolarPanel 10+

Eventually all of your backup batteries and portable chargers are going to die during a prolonged power outage. But assuming any inclement weather that may have been the source of the outage moves on, you can always harness the power of the sun. BioLite’s $105 SolarPanel 10+ pairs a folding 10-watt solar panel with a 3,200 mAh battery, so it can still provide power when the sun goes down. With full exposure to the sun’s rays, the panel can charge its own battery in about 1.2 hours, a smartphone in an hour, or a larger device like an iPad Mini in about 2.3 hours. It’s not the fastest solution available, but it might be the most reliable.