Foldable pouch battery cells are provided for use within traction battery packs. An exemplary pouch battery cell may include flexible portions that can be folded to provide a more compact packaging design compared to conventional pouch style battery cells....

An energy supply device, in particular for a power tool, wherein the energy supply device includes at least one cell and wherein at least one cell of the energy supply device has no pressure relief valve. Moreover, the at least one cell can have a flexible...