How about a USB power strip? This will let you charge your gadgets while still leaving your USB ports open for other tasks. And it takes up less room than a regular power strip. It has an on-off switch, and each of the four ports has a different coloured cap to keep dust and whatnot out of the port when not in use. The best part is you can charge four phones (or whatever) at once using a single wall outlet. Think that might make you popular at the airport? You bet! You might even be able to charge a small fee to fellow travelers! Well, at least until someone finds out...I'm pretty sure that's probably against some rule or another.
This strip measures just 1.1" x 4.4" x 0.75" and features a three-foot cord. Which means it's easy to carry with you pretty much wherever you might go. Don't be confused; this is not a hub, so don't expect to be able to transfer data from your phone to anything else while using it. But since smartphones tend to go through batteries faster than a tornado can wipe out a trailer park, you're going to be charging it about eight times more often than you'll be doing a data transfer. At just $9.99 US, this is one of those things you simply should not pass by.
Source: Craziest Gadgets