Question: what is a 2ah battery?
Answer: A battery stores energy; the “capacity” is how much energy it can store. ... A 12-volt, 1 amp-hour (abbreviated Ah) battery and a 6-volt, 2Ah battery each store 12Wh, but the voltage is usually a critical parameter for a battery, and once a voltage is selected, the capacity can be specified by the amp-hour rating.