Alkalines are a very popular, multi-use premium battery.
Rated at 1.5 volts per cell, they are available in the common AAA, AA, C, D and 9-volt sizes.
They have a very good shelf life and are excellent for high drain rate applications, such as electronics applications.
Alkaline batteries can deliver 50-100% more total energy than conventional carbon zinc batteries of the same size, making them popular for consumer applications.