The results showed that the nickel-zinc batteries could produce an average of 50 more pictures than the alkaline competition.

A battery with only a positive pole will not produce current.

Connected in series, the batteries produced 4 volts of electricity.

This returns the chemicals to their original state, and the battery can again produce electricity.

Advances in battery-manufacturing technologies throughout the second half of the twentieth century have made batteries increasingly cheaper to produce.

The battery produces electricity by combining oxygen from the air with a zinc paste and catalyst.

Primary batteries, or primary cells, can produce current immediately on assembly.

The four batteries in parallel arrangement will produce 1.5 volts at 2,000 milliamp-hours.

The four batteries arranged in a series will produce 6 volts at 500 milliamp-hours.

The system includes a rechargeable battery, measuring three inches by two inches, to produce heat.