Abstract: Packaging device (10, 10?, 10?) for packaging at least one object (12, 12?, 12?), that is essentially flat, in particular a valuable technical object, such as a lithium-ion cell, comprising: a bottom plate (14) having at least one first side rim (42), which is linear in regard to at least a part thereof, and at least one first cover plate (20) having at least one first side rim (46) which is linear in regard to at least one part thereof, which is hingeably linked to the first side rim (42) of the bottom plate (14) such that the cover plate (20) can be hinged between a closed position in which the cover plate at least partially covers the bottom plate, and an open position in which the cover plate is not opposite to the bottom plate, characterized in that the bottom plate (14) or the at least one cover plate (20) comprises on one side a cushioning layer (16, respectively 22), wherein the cushioned side faces the object (12, 12?, 12?) when said object is in the packaging and the at least one cover plate (20) i