Method for determining a maximum duration of use of a battery, characterised in that it includes: - a step of selecting a period of use of the battery; - a step of obtaining values of degradation factors (F i) of the battery during the period of use of the battery selected during the selection step; - a step of determining one or more indicators of ageing (ΔC, ΔR) of the battery on the basis of the degradation factor values obtained during the obtaining step; - a step of identifying intervals (F i,max/min) of variation of the degradation factors during said period of use, each ageing indicator being associated with actual intervals of variation, the intervals of variation each comprise a minimum computed value and a maximum computed value of said factors used during the determination step, the intervals of variation of the degradation factors being identified on the basis of a computation of the mean (F i,mean) and standard deviation (σ i) values of the degradation factors, the values of the degradation factors being obtained during the period of use; and - a step of predicting the maximum duration of use on the basis of an ageing model comprising the steps: generating a maximum duration of use of the battery, for each operating condition corresponding to a combination of the minimum and maximum values of the degradation factors, and on the basis of the operating limits of the battery and the ageing indicator(s), and retaining the minimum value of the duration of use. - a step of selecting a period of use of the battery; - a step of obtaining values of degradation factors (F i) of the battery during the period of use of the battery selected during the selection step; - a step of determining one or more indicators of ageing (ΔC, ΔR) of the battery on the basis of the degradation factor values obtained during the obtaining step; - a step of identifying intervals (F i,max/min) of variation of the degradation factors during said period of use, each ageing indicator being associated with actual intervals of variation, the intervals of variation each comprise a minimum computed value and a maximum computed value of said factors used during the determination step, the intervals of variation of the degradation factors being identified on the basis of a computation of the mean (F i,mean) and standard deviation (σ i) values of the degradation factors, the values of the degradation factors being obtained during the period of use; and - a step of predicting the maximum duration of use on the basis of an ageing model comprising the steps: generating a maximum duration of use of the battery, for each operating condition corresponding to a combination of the minimum and maximum values of the degradation factors, and on the basis of the operating limits of the battery and the ageing indicator(s), and retaining the minimum value of the duration of use. generating a maximum duration of use of the battery, for each operating condition corresponding to a combination of the minimum and maximum values of the degradation factors, and on the basis of the operating limits of the battery and the ageing indicator(s), and retaining the minimum value of the duration of use.