What does battery ah mean?

[EmilioLynn]

Battery ah refers to the capacity unit of a battery: ampere-hour, which is the product of discharge current (ampere A) and discharge time (hour H). When a battery undergoes constant current and constant voltage charging, and then discharges at a constant current, the amount of electricity discharged represents the battery's capacity. Ah is applicable to storage batteries, nickel-metal hydride batteries, etc., but not to lithium batteries. Lithium batteries have a minimum discharge voltage, meaning the discharge voltage cannot fall below 2.75V, typically with 3.0V as the lower limit. A battery is a device that contains an electrolyte solution and metal electrodes to generate electric current, converting chemical energy into electrical energy, housed in cups, tanks, other containers, or partial spaces of composite containers.