What is the amperage of a battery?
It is measured in Ampere-hour – or, more commonly, milliampere-hours (mAh). Most of Battery AA format rechargeable batteries display between 2,100 and 2,500 mAh, with a maximum of 2,700, against 2,800 for alkalines.
Test a pile with a multimeter Calibrate the device according to the pile you want to test (2V is sufficient for a pile AA of 1.5V, for example) Plug the black wire into the COM socket and place the connector on the negative pole of the pile.
During battery operation, the zinc sulphate solution is enriched with zinc ions; the nitrate ions will therefore migrate towards this solution. At the same time, the ammonium ions go into the copper sulphate tank, in order to compensate for the deficit in + ions, due to the consumption of copper ions.
The cell operating equation is obtained by combining the two electrochemical equations at the electrodes. Each of the electrochemical equations is multiplied by a number such that the number of electrons exchanged between the two electrodes is the same.
This capacity is measured in watt-hours (Wh the symbol). A Watt-hour is the voltage (V) that the battery delivers multiplied by the amount of current (Amps) the battery can deliver over a certain amount of time (usually hours). Voltage x Amps x Hours = Wh.
This is what powers battery-operated devices such as walkmans and other connected items. Rechargeable type batteries have a lifetime of several years depending on how you use them.