Abstract: The invention relates to a method of diagnosis of a state of end of life of a determined type of battery such as a cell, in particular a lithium/manganese cell. According to this method, during the use of a battery of the determined type within the framework of a given application, periodic measurements are performed of the voltage across the terminals of the battery and of the corresponding ambient temperature, each measured value of the voltage across the terminals of the battery is compared with corresponding values previously stored during a specific preliminary calibration phase, a counting is established of the number of measured values below the corresponding values measured, and an alert signal warning that the end of the life of the battery is delivered after counting of a number n of measured values below the corresponding values stored.

Abstract: The invention relates to a method and a device for controlling the life of a battery (5) such as a cell, particularly a lithium/manganese cell. According to the method of the invention, a voltage raiser electrically supplied by the battery and adapted to make up for any deficiencies of the latter is used, an indicator parameter of the operation of the battery is selected, and a threshold value of said indicator parameter, below which said battery is considered to be incapable of having a satisfactory performance, is fixed and stored, the indicator parameter is then measured periodically, and the supply to the voltage raiser is triggered if, and only if, the measured value of said indicator parameter becomes lower than the stored threshold value.