PC World magazine tested all the high-end alkalines in digital cameras, standard cameras, toys and flashlights. According to the magazine, Panasonic Oxyride allowed faster shooting, faster flash recovery, faster and longer-lasting toys and brighter flashlights than all other alkalines.
The magazines says its tests indicate they lasted TWICE AS LONG as the other batteries for virtually the same price!
Panasonic Oxyride is available at most drugstores (except Walgreens - I checked) and department stores. I bought a package of four AAA's at Ike's on Union Avenue in Midtown Memphis for $6, including tax.