The Search for a Better Battery Seems Everlasting

Computer chips double in speed every two years. The typical personal computer's storage capacity has expanded 36,000 times since 1989. Internet-connection speeds climb at about 50% a year.

But the batteries that run these devices can't keep up. Their power is rising at only about 10% a year. They hold a charge for maddeningly short periods that have, at one time or another, frustrated every laptop-, cellphone- or Blackberry-toting road warrior. In airport waiting areas, freeloaders routinely rush to the outlets to recharge their gadgets for the next leg of the trip.
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Source: The Wall Street Journal