# US 11,896,197 B2 · Electrical device power management > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,896,197 B2 - Document ID: US11896197B2 - Status: Granted - Kind: B2 - Application number: 17/356,074 - Filed: 2021-06-23 - Published: 2021-10-14 - Granted: 2024-02-13 - Earliest claimed: 2015-05-26 - Assignees: Covidien LP - Applicants: Covidien AG - Inventors: Matthew John Ross McGrath; Peter Douglas Colin Inglis; Brian Alan Laffoley - Web page: https://patentgrep.com/patent/US11896197B2 ## CPC - A61B 1/00034: {rechargeable} - A61B 1/00025: {characterised by power management} - A61B 1/04: combined with photographic or television appliances - A61B 1/267: for the respiratory tract, e.g. laryngoscopes or bronchoscopes - G01R 31/3648: {comprising digital calculation means, e.g. for performing an algorithm} - G01R 31/382: Arrangements for monitoring battery or accumulator variables, e.g. SoC - H01M 6/50: Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) - H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) - H01M 10/488: {Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density} - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/24: adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658) - A61B 1/00029: {externally powered, e.g. wireless} - H01M 6/5044: {Cells or batteries structurally combined with cell condition indicating means} - H02J 7/82: Control of state of charge [SOC] - Y02E 60/10: Energy storage using batteries - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract An electrical device includes a memory storing a value indicative the remaining available rated capacity of one or more batteries. The stored value is changed in use to reflect reducing capacity. The initial stored value is chosen so that there is a very high (e.g. >99.9%) confidence that the one or more batteries will provide at least the capacity indicated by the initial stored value. This reduces the chance of failure during emergency procedures. The one or more batteries may be integral to the electrical device. An override facility is provided. ## Claims ### Claim 1 A method, comprising: accessing a first value indicative of a remaining available rated capacity of a first battery pack of a video laryngoscope; displaying the first value on a display screen of the video laryngoscope; updating the first value to reflect a first power consumption from the first battery pack resulting from operation of the video laryngoscope; powering down the video laryngoscope; accessing a second value indicative of a remaining available rated capacity of a second battery pack of the video laryngoscope in response to powering up the video laryngoscope after the powering down; displaying the second value on the display screen of the video laryngoscope; and updating the second value to reflect a second power consumption from the second battery pack resulting from additional operation of the video laryngoscope. ### Claim 2 (depends on 1) The method of claim 1, wherein powering down the video laryngoscope based on the updated first value comprises: determining that the updated first value indicates the remaining available rated capacity of the first battery pack is below a predetermined threshold; and powering down the video laryngoscope in response to determining that the updated first value is below the predetermined threshold. ### Claim 3 (depends on 1) The method of claim 1, wherein powering down the video laryngoscope deactivates one or more of the display screen, a video camera, and a light. ### Claim 4 (depends on 1) The method of claim 1, wherein updating the first value comprises writing the updated first value to a memory of the video laryngoscope. ### Claim 5 (depends on 1) The method of claim 1, wherein updating the first value to reflect the first power consumption from the first battery pack resulting from operation of the video laryngoscope comprises: determining an operating mode of the video laryngoscope; and updating the first value based on the first power consumption associated with the operating mode. ### Claim 6 (depends on 1) The method of claim 1, comprising outputting a sound or graphical indicator indicating that the remaining capacity determined from the updated first value is approaching zero. ### Claim 7 (depends on 1) The method of claim 1, wherein updating the first value comprises the first value based on a temperature as measured by a temperature sensor of the video laryngoscope. ### Claim 8 (depends on 1) The method of claim 1, wherein one or more batteries of the second battery pack have a different rated capacity than one or more batteries of the first battery pack. ### Claim 9 A method, comprising: accessing a first value stored in a memory of a video laryngoscope, wherein the first value is indicative of a remaining available rated capacity of a first battery pack of the video laryngoscope; displaying a first graphical indicator of the first value on a display screen of the video laryngoscope; powering down the video laryngoscope; accessing a second value stored in the memory of the video laryngoscope, wherein the second value is indicative of a remaining available rated capacity of a second battery pack in response to powering up the video laryngoscope after the powering down; and displaying a second graphical indicator of the second value on the display screen of the video laryngoscope. ### Claim 10 (depends on 9) The method of claim 9, wherein powering down the video laryngoscope is based on a user input. ### Claim 11 (depends on 9) The method of claim 9, wherein powering down the video laryngoscope is based on the first value. ### Claim 12 (depends on 9) The method of claim 9, comprising deactivating one or more components of the video laryngoscope based on the first value. ### Claim 13 (depends on 12) The method of claim 12, wherein the one or more components comprise the display screen, a video camera, and a light. ### Claim 14 (depends on 9) The method of claim 9, wherein the second battery pack comprises a different or recharged battery relative to the first battery back.