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Milliamp Hour (mAh) An Milliamp Hour(mAh) is a unit for measuring electric power over time. mAh is commonly used to describe the total amount of energy a battery can store at one time. It's the easiest way to distinguish the strength or capacity of a battery. The higher the mAh, the longer the battery will last.
How industry makes measuring battery capacity confusing. Most products show battery capacity measured in âamp-hoursâ (Ah) and milliamp-hours (mAh), where 1000mAh = 1Ah. Amp-hours is a measure of âcurrent capacityâ, not âenergy capacityâ. This is a subtlety, but it is important.