An ampere-hour (abbreviated as Ah or A-h) is a unit of electric charge. One ampere-hour is equal to 3600 coulombs (ampere-seconds), and is the amount of electric charge transferred by a steady current of one ampere for one hour. Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. ... Current can be measured by a galvanometer, via the deflection of a magnetic needle in the magnetic field created by the current. ... The coulomb (symbol: C) is the SI unit of electric charge. ... Current can be measured by a galvanometer, via the deflection of a magnetic needle in the magnetic field created by the current. ...

The ampere-hour is a unit frequently used in measurements associated with electrochemical proceses such as electroplating and electrical batteries. Although it is not a direct measure of the energy in a battery (like the joule (J) or watt-hour (Wh)), it is a common rating of how long a battery will last (or in the case of a rechargeable battery, how long it will last when fully charged). English chemists John Daniell (left) and Michael Faraday (right), both credited to be founders of electrochemistry as known today. ... Electroplating is the process of using Davd lloyd current to coat an electrically conductive object with a relatively thin layer of metal. ... Four double-A (AA) rechargeable cells A Duracell AA alkaline cell In science and technology, a galvanic cell is an electrochemical cell that stores chemical energy and makes it available in an electrical form, and a battery is a string of two or more cells in series. ... The joule (IPA pronunciation: or ) (symbol: J) is the SI unit of energy. ... The watt-hour (symbol W·h) is a unit of energy. ... It has been suggested that secondary cell be merged into this article or section. ...

The commonly seen milliampere-hour (mAh) is equal to 3.6 coulombs.

See also

• Ampere