Do you need to charge your phone and another USB device (your kid's Nintendo Switch, for example) at the same time? Many of these have a dual USB port to accommodate your charging needs. Would you also like a jump starter or battery charger with an AC inverter so you can plug in a radio, a lamp or another small appliance during a power failure or at a campsite? Done: These power pack devices are basically the ultimate power bank. Want a battery booster with a built-in air compressor so you can fill up your raft at the lake or a low tire before you head home from the airport? No problem. What else can it do? On a single charge, a portable car battery pack or charger can power your high-draw laptop computer several times longer than its own built-in battery. A portable jump starter battery is a good insurance policy to have in your car.
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