Anybody who knows anything about electricity knows that when it comes to flash light batteries (or more generally for these modern times, dry cells), the important thing is how much “energy” you get for your money. And yet, the packaging for dry cells tells you virtually nothing about this important specification. And there is nothing to indicate why, say, one brand of 9 volt battery at $2.50 may actually be a better value buy than another at $3.00.
Seems to me it boils down to how many watts (unit of energy) a battery is capable of delivering at some standardized rate of discharge. It should be fairly simple for battery manufacturers to include this information on their packaging (you KNOW they know what the values are) and for retailers to label the prices so that the consumer would be able to compare various batteries on their $ per watt rating.
Even in the wet cell arena, such as automotive batteries, such important values as “ampere-hours” and “cold cranking amps” are readily specified, but nary is a price per energy unit seen.
Come on FTC, jump on this one