A HUMAN NECESSITIES
A61 MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61M DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
A61M2205/00 General characteristics of the apparatus
A61M2205/82 Internal energy supply devices
A61M2205/8206 battery-operated
A61M2205/8212 with means or measures taken for minimising energy consumption