Ampere-hour

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The amount of current a power source (such as a battery) can supply for one hour. Batteries are often rated in milliamp hour, a battery rated at 100mAh can supply a circuit 100mA for one hour, or 10mA for 10 hours.

This is helpful in knowing typically how long a battery can power a circuit.

Simply take the rating of the battery (e.g. 250mhA) and divide it by the power requirements for the circuit. The result is the length of time the battery should be able to power the circuit. Know, however, that batteries typically never match their rating exactly, and that batteries may lower in voltage as they discharge (are used). If the voltage drops below the minimum required for the circuit, it may stop powering it even though the battery has not fully drained.

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NOTE: All information contained within this article is pure opinion. Although this article is intended to help people, it may contain faulty or misleading information. This article is not to be considered professional opinion or advice, and is in no way a replacement for reading all safety/instructional documentation. Always remember to protect yourself when handling/using hazardous materials, as well as test new techniques before using them on projects/work intended to be handed in or used.

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