NOVELTY - The cell (1) has a separator (2) arranged between two electrodes of different electrical polarity. The separator includes an array (5) of sensors (6) e.g. temperature sensor and pressure sensor. The array of sensors follows a periodic pattern on the separator. The separator includes a flat structure of sensors arranged in side by side of or in the separator. The sensors are equipped with a private data memory (11) for the storage of measured values measured by the respective sensor. A reading device is provided for reading the stored values in the data memory.    USE - Electrochemical cell for an electrochemical energy storage device (claimed) for an electronic device. Uses include but are not limited to an alkaline manganese cell, lithium cell, lithium-iron sulfide cell, lithium manganese dioxide cell, lithium-thionyl chloride cell, lithium-sulfur cell, lithium-carbon monofluoride cell, nickel oxyhydroxide cell, mercuric oxide-zinc cell, silver oxide- zinc cell, zinc-manganese dioxide cell, zinc chloride cell and a zinc-air cell for a lithium ion energy storage device e.g. lead-acid battery, sodium-sulfur battery, nickel-cadmium battery, nickel-iron battery, nickel-lithium secondary battery, nickel-metal hydride storage battery, nickel-hydrogen storage battery, nickel-zinc battery, lithium iron phosphate secondary battery, lithium-ion secondary battery, lithium manganese battery, lithium-polymer secondary battery, lithium-sulfur battery, silver-zinc accumulator vanadium redox battery, zinc-bromine battery, zinc-air battery, Zebra battery cellulose polypyrrole cell and tin-lithium-sulfur battery, for a mobile phone, a digital camera, camcorder, laptop, handheld console, flashlight, electric -bike, electric vehicle and hybrid vehicle.    ADVANTAGE - The separator is arranged between the two electrodes of different polarity, and includes the array of sensors following the periodic pattern on the separator, thus providing an improved electrochemical cell, ensuring local or geographically distributed monitoring of different metrics or operating parameters of the cell in a more reliable and accurate manner, ensuring earlier diagnosis of possible malfunctions, fault conditions and failure situations in the cell.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a method for manufacturing an electrochemical cell or an electrochemical energy storage device    (2) an electrochemical energy store device.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of an electrochemical cell.    Electrochemical cell (1)    Separator (2)    Array (5)    Sensor (6)    Data memory (11)