Unlike many backup batteries on the market today, the Portable Power Supply with Hand Crank won’t fit in your pocket. Also unlike many backup batteries, this one can power a lamp or even your computer as well as recharge your tablet or phone. This device provides “AC power for lights, TVs, stereos, small appliances and computers (includes AC adapter); DC power for jumpstarting cars and boats (includes jumper cables); USB 2.0 power for phones, laptops and MP3 players; and it has a built-in super LED flashlight is always there when you need it.” You can charge it with AC power or from your car’s power outlet. In an emergency, you can even recharge it with a hand crank. It’s easily stored in a closet at home or in your car trunk, so it’s nearby when you need it. It’s $249.99 at Brookstone.