Long-life AA battery.
Initially only used in fancy camera batteries, lithium is now available in AA and 9V batteries for use in things like smoke detectors and digital cameras. They are more expensive than regular batteries, but last a lot longer which makes the cost per unit of energy competitive. They also have a very long shelf life compared to other batteries so they do well in emergency flashlights and the like.
Source: Radio Shack
Contributor: Theodore Gray
Acquired: 7 August, 2002
Price: $3
Size: 2"
Purity: <5%
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