GoPlug is a Kickstarter project aiming to cram backup batteries, USB charging ports, and -- for the first time -- a true three-prong outlet (or Euro-style two-prong, if that's your jam) into backpacks and luggage. Sounds pretty convenient! But is it something you'd actually use? There are a lot of ideas out there that sound really convenient and useful, but that solve such a narrow problem that people rarely use them. Backup batteries are great when you remember to recharge them -- but if you were such a whiz at recharging stuff, you wouldn't need that emergency plug-in in the first place, would ya champ?
Of course, the real use for a backpack that boasts a wall outlet is to extend the lifespan of your battery-operated doodads. So you can go further off-the-grid, and use your gizmos twice as long. In that case, your backup battery isn't a safety net, it's a range extender.