Battery operated prostheses and systems having increased energy efficiency are disclosed. A prosthesis includes a first and second limb member coupled to an actuator to form a joint. The prosthesis further includes a rechargeable battery electrically coupled to the actuator. The actuator uses energy received from the rechargeable battery to actuate the first limb member relative to the second limb member. During at least a portion of a gait cycle of a wearer of the prosthesis, the actuator converts kinetic energy into first electrical energy that is greater than second electrical energy supplied to the actuator from the rechargeable battery. The prosthesis further includes a recharging circuit. The recharging circuit can receive at least a portion of the first electrical energy from the electric actuator and can supply some of the at least a portion of the first electrical energy to the rechargeable battery to recharge the rechargeable battery.

A hand-held electromechanical surgical device is configured to selectively connect with a surgical accessory. The surgical device includes a power-pack, an outer shell housing, and a gasket. The power-pack is configured to selectively control a surgical accessory. The outer shell housing includes a distal half-section and a proximal half-section, the distal half-section and the proximal half-section together defining a cavity configured to selectively encase substantially the entire power-pack therein. The gasket is located between the distal half-section and the proximal half-section of the outer shell housing. The gasket is configured to create a seal between the distal half-section and the proximal half-section and to provide a sterile barrier between the power-pack and an outside environment outside the outer shell housing.

A system for powering a prosthetic arm is disclosed. The system includes at least one internal battery located in the prosthetic arm, at least one external battery connected to the prosthetic arm, and a master controller configured to connect either the at least one internal battery or the at least one external battery to a power bus to power the prosthetic arm.

A hand-held electromechanical surgical device is configured to selectively connect with a surgical accessory. The surgical device includes a power-pack, an outer shell housing, and a gasket. The power-pack is configured to selectively control a surgical accessory. The outer shell housing includes a distal half-section and a proximal half-section, the distal half-section and the proximal half-section together defining a cavity configured to selectively encase substantially the entire power-pack therein. The gasket is located between the distal half-section and the proximal half-section of the outer shell housing. The gasket is configured to create a seal between the distal half-section and the proximal half-section and to provide a sterile barrier between the power-pack and an outside environment outside the outer shell housing.

The invention relates to a covering element for arranging on an orthopaedic device (1), wherein the covering element (10) has a supporting structure (11) which, when the covering element (10) is in the state attached to the orthopaedic device (1), has an inner side (12) facing the orthopaedic device (1) and an outer side (13) facing away from the latter, and at least one fastening device (15) for fastening the covering element (10) to the orthopaedic device (1), wherein at least one photovoltaic cell (20) is arranged on the outer side (13) or so as to be oriented towards the outer side (13).