1. A temperature-regulating support, comprising: a head part; a body part coupled to the head part; at least one temperature-regulating layer configured to be regulated to an at least substantially constant temperature in a range from 15 to 42° C. with the temperature capable of being set in dependence on a patient by an apparatus and a support layer, the at least one temperature-regulating layer having a battery as a power supply, the battery configured to be arranged in a compartment of the support so as to be capable of being removed from the compartment and inserted into the compartment; and the apparatus is arranged at the battery; and a battery housing having an upper shell, a lower shell, and a cover, with the upper shell being connected to the lower shell and the cover being releasably coupled to the upper shell and to the lower shell by a releasable snap-in connection, and a seal disposed on the upper shell and the lower shell, such that the seal is configured to contact the cover when the cover is snapped in to the upper and lower shells, and the seal is configured to be disengaged from the cover when the cover is released from the upper and lower shells.