Here is a tray with a rechargeable battery that attaches to your carry-on luggage and lets you charge your smartphone, tablet, or other devices while you are waiting at an airport gate. You don’t have to worry about where you are sitting when you can use this solution to charge your gadgets. Its twin clamps attach to your bag’s telescoping handle. You can use your device to keep up with the news or play with apps while it charges.
More gadgets like this: here
The battery provides you with up to 55 hours of talk time for a smartphone. The removable battery can be used on its own during your flight. Sets you back under $60 at this time.
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