A method for monitoring the state of charge or the residual capacity of a battery or a battery in automation technology

The invention relates to a method and an apparatus for monitoring the state of charge or the residual capacity of a battery pack (8) or a battery (8a, 8b) or a battery that or for supplying power to a field device (F1) used in automation technology, with a battery pack (8) or the battery (8a, 8b) or battery associated data memory (24), wherein in the data memory (24) specific information on the battery pack (8) or the battery (8a, 8b) or . the battery is stored, wherein process-specific and operation-specific information on the power consumption in the data memory (24) is written and wherein in case of using the battery pack (8) or the battery (8a, 8b) or the battery in a second field device, (F2) of the automation equipment based on the process and operation-specific information, the remaining service life of the battery pack (8) or the battery (8a, 8b) or of the battery is calculated and output w ill.