Abstract: A process for supplying a medical device (4), in which at least one battery (5) is supplied with energy, wherein the batteries (5) undergo a calendar-based and/or cycle-dependent aging. The utilization time of the batteries (5) in the medical device (4) is prolonged beyond the conventional replacement periods both within the framework of interruption-free power supply and in mobile use. Provisions are made for determining a remaining calendar-based life of the battery (5) from the difference of the total life of the battery (5) and the operating time of the battery (5) and/or for determining a remaining cycle-dependent life of the batteries (5) from the product of the operating time of the batteries (5) by the ratio of the remaining capacity of the battery (5) to the discharged capacity of the battery (5).

Abstract: A medical system with a medical device and with a supply unit. The supply unit is designed to be separably connected to the medical device and to supply the medical device with electric energy without interruption. The medical system has an isolating transformer and a changeover device, wherein the changeover device is connected to the isolating transformer and to the medical device and is designed to connect the medical device or the supply unit to an electric supply network via the isolating transformer as desired.

Abstract: A medical system with a medical device and with a supply unit. The supply unit is designed to be separably connected to the medical device and to supply the medical device with electric energy without interruption. The medical system has an isolating transformer and a changeover device, wherein the changeover device is connected to the isolating transformer and to the medical device and is designed to connect the medical device or the supply unit to an electric supply network via the isolating transformer as desired.