[julie_m]

Back in the early 1990s, I remember Panasonic alkalines were the best value in terms of joules for your pound. Duracell claimed more amps-hours per cell, but Panasonic were half the price. I knocked up a quick and dirty adaptor to feed a pair of D cells into the mains adaptor jack of my personal stereo cassette player, for listening on long journeys. They managed at least 24 hours' continuous operation on auto-reverse at one point.

I'm really not keen on disposable batteries, though. Even a two-stroke generator is a less polluting way of getting power where the mains doesn't reach, and again cheaper per joule.