Duracell's Bunny Buster?

The battery maker says its new Ultra trounces rivals

In today's ever more mobile society, it sometimes seems as if everything--from your child's power-assisted lollipop to the latest palmtop--eats batteries. Yet we don't have much choice in disposable batteries: Despite constant battles between the Energizer Bunny and Duracell International's Copper Top, tests have shown there isn't much difference between battery brands--they all poop out at about the same rate.

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