[ELI5] Why are battery capacities expressed in Ah (Amperes-hour) and what does it mean, for example, a AA battery that is 2500 mAh?
In: 68
That’s the amount of charge it has. Charge is measured in Coulombs, and an amp is a Coulomb/s. It’s like how we measure energy in kWh, Watts are a measure of power which is Joules/s. The h is a multiplication by hours, so the time factor cancels out.
A 2500mAh battery can supply 2500mA for one hour, or 25 mA for 100 hours or any other combination within reason. (Extreme circumstances may give different results)
You can also figure out how much energy it has from that. A double A battery is 1.5V, with 2500mAh, that’s .375 Wh of energy (1350J)
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