A battery doesn't make any watts by itself, it has to be hooked up to a load first. And even something as tiny as an AAA battery can put out some decent watts for a brief moment if hooked up to something that'll pull a lot of amps - like a short circuit.
alkaline AAA = 1.5 volts
Normal clocks use little power, for example I have one that lasts 1 year with a single AAA battery.
Many different battery brands include AAA batteries some examples of AAA battery brands include two of the biggest battery brands, Energizer and Duracell.
AAA is the size of the battery, there are many types and makes of AAA battery and the shelf life for each is different.
1.5 volts
a AAA battery. Or a watch battery, or a AAAA battery, or any number of battery types. http://en.wikipedia.org/wiki/List_of_battery_types
There are many benefits to having an AAA membership. For example if a car breaks down, AAA offers battery replacement, battery boost and fuel delivery. Check out their official site for more benefits.
They both involve batteries.
chemicals
What are the ingredients in a AA battery?
why do aaa batteries overheat
AAA type alkaline battery is a carbon-zinc battery; the tension is 1,5 V. The electrolyte is ammonium chloride as a paste.