What Does Amp Hours On A Battery Mean. The standard rating is an amp rating taken for 20 hours. What this means for a 100 AH rated battery is this.

An amp hour is a number for a battery that means if a machine is drawing that number of amps from the battery then the charge will be drained in one hour. Amp hours are measured at the. Basically this denotes how long a battery will put out an amp of power if it isnt recharged.
Much more important.
So a 40Ah battery will run at least twice as long as a 20Ah battery of the same voltage before it needs to be charged up again. A typical Amp Hour specification might read 100 AH 20HR. This means to get the figure of 32 amp hours they discharged the battery at 065A for 32 065 492 hours. The Amp Hour also has sub-units like the MilliAmpere-Hour mA-h or mAh and the MilliAmpere-Second mA-s which is the unit of measure used in X-ray diagnostic imaging and radiation therapy.

