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Sam ChenAugust 6, 2017

mAh, or milliamp hour, is a measure of how many milliamps can be constantly delivered over a period of an hour. For example, a battery rated at 1000 mAh would be able to deliver a constant 1000 milliamps over the course of 1 hour, a constant 100 milliamps over the course of 10 hours, or any other combination milliamps and number of hours that would equate to 1000 milliamps over 1 hour.

Generally speaking, the higher the mAh, the higher the capacity of the battery however, mAh ratings can only be used when comparing batteries of the same voltage. Typically, mAh is used as a rating for smaller batteries such as those used for personal electronic devices while Ah, or amp hour, is used for larger batteries such as those used in vehicles.

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Sam Chen
Hardware and Technology Enthusiast. SSD Evangelist. Editor-in-Chief.