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In their AA battery tests ConsumerReports found the Energizer e2 Lithium cost 2-3 times alkalines but lasted 6 times longer for a camera flash battery.
The alkalines all performed about the same.

For gear with a high power drain (Video camera) or for devices you use often, rechargeable, Nickel Metal Hydride (NiMH), batteries are much more economical than disposables. (see the battery page in the Home and Garden section)

Nickel oxy-hydroxide similar to alkalines. Better performance in a digital camera, worse in a CD player.

Laptop Battery Finder
Lead Acid Battery types in Home & Garden.
Battery Equaliser claims to disolve existing sulphation and prevent new deposits from forming

Batteries in Home & Garden and Auto section.
Jump Start Batteries

last updated 18 May 2008