Duracell has introduced the Swiss Army knife of auto-emergency devices dubbed the "Powerpack 450 with Voice". It'll jumpstart a dead car battery, inflate a flat tire, charge a cell phone, power a personal computer, run power tools and even use its voice technology to tell the mechanically challenged how to safely jumpstart a battery and inflate a tire. For home power outages, the Powerpack 450 will power a portable radio, internet modem, computer or television. It operates both DC and AC devices, weighs about 23 pounds and should retail for about $125. Duracell offers other emergency power supplies that are both more and less powerful, but those lack the jumper cables and air compressor. For more, go to duracellpower.com.