Method for capturing truck data over an operating duration of an industrial truck for dimensioning the capacity of a battery device of the industrial truck in a predetermined operating area of the industrial truck using a data-capturing device, comprising the following steps: - ascertaining a first truck parameter and a second truck parameter over the operating duration of the industrial truck by means of the data-capturing device, wherein the first truck parameter includes at least one characteristic value for a power consumption of the industrial truck in order to ascertain a current state of charge of the battery device of the industrial truck therefrom, and wherein the second truck parameter includes at least one characteristic value for the use or non-use of the industrial truck during the operating duration of the industrial truck, wherein the characteristic value indicates whether the industrial truck is moving within the operating area or whether the industrial truck is in a parked position, - ascertaining the capacity of the battery device of the industrial truck on the basis of the recorded first truck parameter and the second truck parameter by means of an evaluation device, wherein a defined number of possible stop locations of the industrial truck within the operating area is first ascertained on the basis of an ascertained non-use duration of the industrial truck, with the possible stop locations being synthesised heuristically and/or stochastically, and wherein a time period in which the battery device can be interim charged at the possible stop locations is then ascertained in each case on the basis of the ascertained number of possible stop locations of the industrial truck and the ascertained power consumption of the industrial truck, wherein the capacity of the battery device is dimensioned such that, by interim charging at the possible stop locations of the industrial truck, it is not necessary to change the battery device during the operating duration of the industrial truck. - ascertaining a first truck parameter and a second truck parameter over the operating duration of the industrial truck by means of the data-capturing device, wherein the first truck parameter includes at least one characteristic value for a power consumption of the industrial truck in order to ascertain a current state of charge of the battery device of the industrial truck therefrom, and wherein the second truck parameter includes at least one characteristic value for the use or non-use of the industrial truck during the operating duration of the industrial truck, wherein the characteristic value indicates whether the industrial truck is moving within the operating area or whether the industrial truck is in a parked position, - ascertaining the capacity of the battery device of the industrial truck on the basis of the recorded first truck parameter and the second truck parameter by means of an evaluation device, wherein a defined number of possible stop locations of the industrial truck within the operating area is first ascertained on the basis of an ascertained non-use duration of the industrial truck, with the possible stop locations being synthesised heuristically and/or stochastically, and wherein a time period in which the battery device can be interim charged at the possible stop locations is then ascertained in each case on the basis of the ascertained number of possible stop locations of the industrial truck and the ascertained power consumption of the industrial truck, wherein the capacity of the battery device is dimensioned such that, by interim charging at the possible stop locations of the industrial truck, it is not necessary to change the battery device during the operating duration of the industrial truck.