The present invention demonstrates a monitoring method of accumulators or batteries (11), which is arranged to measure at least one parameter relating to an accumulator, batteries or their environment and having an
impact on or indicating the operational state of the accumulator (11). The measuring unit (14) controls locally measurements, collects the data and transmits them, for example, to the
server (12, 63, 64) managed by the party monitoring the accumulator, which can be executed as cloud service. A calculation and prediction
algorithm for the accumulator's service life can be connected to the service, calculating the estimate on the accumulator's remaining service life based on
accelerated life testing and measurement results as well as different kinds of prediction data. This data with instructions can be transmitted to the user (65) of the vehicle, for example, to their
mobile phone (66). The measurement data can also be transmitted directly from the monitoring apparatus (14) to the user's own terminal device (13) without a separate
server via
Bluetooth or WLAN connection. The method also comprises the detection and locating of accumulators (11) at the end of their service life by means of a positioning
signal, which can be observed with a fixed (41) or mobile (42)
receiver device. The invention can be applied to the recycling of accumulators and batteries so that accumulators and batteries that have been left unreturned and that are about to end up into the nature or dumps as
hazardous waste can be located and reclaimed.