Energy storage is perfect if you need to charge personal electronics and small appliances while away from your household AC outlet for extended periods of time, or if you want to have backup power ready in case of an emergency.
These devices are basically large batteries in a protective case with built-in AC outlets and other ports. They're much larger, heavier, more powerful, and generally sturdier than the gas-powered portable generators and portable laptop chargers we recommend. This makes them more versatile, such as camping with a lot of electronic gear, working in a remote corner of the home, screening movies in the backyard, or doing landscape photography.
In an emergency, although not very powerful, they have some major advantages over gas-powered portable generators. Portable outdoor power banks are silent and have no emissions, which means you can safely use them inside the house during a power outage. And, since there's no motor, you don't have to keep gasoline on hand, or perform the oil changes or other minor maintenance an internal combustion engine requires.
One is about the size of a standard plastic milk crate and weighs 50 pounds, which you probably wouldn't carry around in a backpack or briefcase. But you can charge your outdoor power banks overnight at a wall outlet (recharging most of them from empty to full takes 12 to 24 hours), or leave them in the sun with a solar pack, Pack it in the trunk with the rest of your gear, then power your phone, laptop, camera, projector, GPS unit, drone, or other electronic device for hours at a time while on the go. Outdoor power banks also typically offer more output options than just AC and USB, such as 6mm DC ports and car power outlets to support a wider range of devices.
Another best partner of the portable outdoor mobile power supply is the solar folding bag. During a long journey, the energy storage is easy to run out of power. The solar folding bag can solve this problem very well. Just display it in the sun, It can charge portable outdoor power banks, and can also charge small electronic products such as mobile phones and Ipads.
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