A battery pack , in particular for an electric hand tool, with: at least one substantially cylindrical battery cell with a lateral surface and two poles in the region of the end faces and a housing for receiving the at least one rechargeable cell , the housing having ventilation recesses via which cooling air from the environment can penetrate into the interior of the housing and be released again to the environment, and a cell carrier for storing the at least one battery cell in the interior of the housing, characterized in that the cell carrier has airtightly closed side walls with a number of bearing sections for mounting the pole-side end sections of the battery cells to be accommodated, the inner circumference of which bearing sections corresponds to the outer circumference of the battery cells to be accommodated in the region of their pole-side end sections, in such a way that the battery cells are held at a distance from one another and in the region of their outer surface the cooling air in the interior of the housing can flow around them at least in sections, wherein the battery cell is mounted in the cell carrier in the region of its pole-side end portions in a fixed manner and with virtually no play, so that the resulting pole regions (P1, P2) of the battery pack are accommodated in an airtight manner within the housing, and wherein the cell carrier has at least two pressure compensation devices which, in the event of a predetermined overpressure at one of the pole regions of the battery pack, enable pressure compensation, in particular with the interior of the housing and, via the ventilation recesses of the housing, with the environment, and each of which is associated with one of the side walls of the cell carrier . at least one substantially cylindrical battery cell with a lateral surface and two poles in the region of the end faces and a housing for receiving the at least one rechargeable cell , the housing having ventilation recesses via which cooling air from the environment can penetrate into the interior of the housing and be released again to the environment, and a cell carrier for storing the at least one battery cell in the interior of the housing, characterized in that the cell carrier has airtightly closed side walls with a number of bearing sections for mounting the pole-side end sections of the battery cells to be accommodated, the inner circumference of which bearing sections corresponds to the outer circumference of the battery cells to be accommodated in the region of their pole-side end sections, in such a way that the battery cells are held at a distance from one another and in the region of their outer surface the cooling air in the interior of the housing can flow around them at least in sections, wherein the battery cell is mounted in the cell carrier in the region of its pole-side end portions in a fixed manner and with virtually no play, so that the resulting pole regions (P1, P2) of the battery pack are accommodated in an airtight manner within the housing, and wherein the cell carrier has at least two pressure compensation devices which, in the event of a predetermined overpressure at one of the pole regions of the battery pack, enable pressure compensation, in particular with the interior of the housing and, via the ventilation recesses of the housing, with the environment, and each of which is associated with one of the side walls of the cell carrier . <EOS>