Eveready Red AA, 1.5 V batteries provide better capacity power which also lasts longer. A zinc-carbon battery is a dry cell primary battery that delivers about 1.5 volts of direct current from the electrochemical reaction between zinc and manganese dioxide. The batteries in this pack encompass AAA size with a capacity of 540 mAh and are non-rechargeable. They are also lightweight and durable.
Benefits: 

A higher energy density is available in zinc chloride batteries.
Zinc chloride battery has high efficiency under heavy discharge conditions. It has better low-temperature performance and has smaller leakage resistance.