An ampere-hour is defined as a current of one ampere flowing for one hour. If you multiply the current in amperes by the time of flow in hours, the result is the total number of ampere-hours. Amperehours are normally used to indicate the amount of energy a storage battery can deliver.

Figure 1 Simple Hydrometer

Summary

Battery terms are summarized below.

Battery Terminology Summary

A voltaic cell is a combination of materials used to convert chemical energy into electrical energy.

A battery is a group of two or more connected voltaic cells.

An electrode is a metallic compound, or metal, which has an abundance of electrons (negative electrode) or an abundance of positive charges (positive electrode).

An electrolyte is a solution which is capable of conducting an electric current.

Specific gravity is defined as the ratio comparing the weight of any liquid to the weight of an equal volume of water.

An ampere-hour is defined as a current of one ampere flowing for one hour.