Japan's NTT DoCoMo's always ahead of the curve. This time, it has a "battery jacket" that can recharge a cellphone to full power in 10 minutes. In the time it takes me to eat a lunch, my cellphone can be juiced up for the rest of the day. That's crazy.
Ever plug in your phone just to find out that another inch or two would allow you to perfectly set it down on the corner of your desk, or keep using it? Designer Yuchen Liu's conceptual charger won't ever run short, though you may want to keep it away from the cat.
The packaging on AA and AAA alkaline batteries always warn you never to recharge them when they've reached their end, but it turns out they can be; as long as you have a special charger.