Law of Peukert

The law of Peukert , stated by the German scientist W. Peukert in 1897, expresses the battery capacity according to the level of which it is discharged. As this rate increases, the capacity of the battery decreases, although its real capacity tends to remain constant. The law of Peuker makes it possible to calculate the total energy provided by an ideal battery and is represented by the following equation:

$C_p = I^k t$

With:

$C_p \,$ is the capacity according to Peukert, on a level of discharge of 1 amp, expressed in Ampère-heure;
$I \,$ is the current one of discharge, expressed in amp;
$k \,$ is the constant of Peukert, Nombre without dimension;
$t \,$ time of discharge, in hour.

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