# US 12,008,424 B2 · Battery charger for a transaction card > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,008,424 B2 - Document ID: US12008424B2 - Status: Granted - Kind: B2 - Application number: 18/164,774 - Filed: 2023-02-06 - Published: 2023-06-15 - Granted: 2024-06-11 - Earliest claimed: 2018-08-31 - Assignees: Capital One Services, LLC - Applicants: Capital One Services, LLC - Inventors: Adam R. Koeppel; Molly Johnson; Tyler Locke; James Zarakas - Web page: https://patentgrep.com/patent/US12008424B2 ## CPC - G06K 19/0702: {the arrangement including a battery} - G07F 7/08: by coded identity card or credit card {or other personal identification means (without personal verification means G07F7/02)} - H02J 7/44: between battery management systems and power sources - H02J 7/731: {specially adapted for holding portable devices containing batteries (H02J7/751 takes precedence)} - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS - G07F: COIN-FREED OR LIKE APPARATUS (coin sorting G07D3/00; coin testing G07D5/00; {handling coins or paper currencies apart from payment activated apparatus G07D; payment architectures, schemes or protocols G06Q20/00}) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract Examples described herein describe a battery charger for a transaction card. According to some implementations, a charging device may detect a transaction card is received within a charging slot when an integrated circuit (IC) chip of the transaction card is in contact with a charging terminal; request a user device to provide power to charge the transaction card via the charging terminal, wherein the user device is communicatively coupled to the charging terminal; receive the power from the user device; and provide the power to the transaction card to charge a battery of the transaction card. ## Claims ### Claim 1 A user device, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to: monitor a charging terminal of a charging device receiving a transaction card; determine, based on monitoring the charging terminal, that the transaction card has been removed from the charging device for a threshold period of time; and transmit a notification that the transaction card has been removed from the charging device for the threshold period of time, to a backend device to disable a function of the transaction card. ### Claim 2 (depends on 1) The user device of claim 1, wherein the one or more processors, to determine that the transaction card has been removed from the charging device for the threshold period of time, are configured to: receive, from the charging device, the notification that the transaction card has been removed from the charging device for the threshold period of time. ### Claim 3 (depends on 1) The user device of claim 1, wherein the charging terminal is monitored when the user device is in electrical communication with the charging terminal. ### Claim 4 (depends on 3) The user device of claim 3, wherein the one or more processors are further configured to: provide a charge to the charging terminal, wherein the charging terminal is monitored based on providing the charge. ### Claim 5 (depends on 3) The user device of claim 3, wherein the one or more processors are further configured to: detect that the user device is inserted into a charging slot of the charging device, wherein the charging terminal is monitored based on detecting that the user device is inserted into the charging slot. ### Claim 6 (depends on 1) The user device of claim 1, wherein the transaction card is determined to have been removed from the charging device for the threshold period of time based on a change in resistance between a supply contact and a ground contact of the charging terminal. ### Claim 7 (depends on 1) The user device of claim 1, wherein the one or more processors are further configured to: detect that the transaction card has been inserted into the charging device, wherein the charging terminal is monitored based on detecting that the transaction card been inserted into the charging device. ### Claim 8 A method, comprising: monitoring, by a user device, a charging terminal of a charging device receiving a transaction card; determining, by the user device and based on monitoring the charging terminal, that the transaction card has been removed from the charging device for a threshold period of time; and transmitting, by the user device, a notification that the transaction card has been removed from the charging device for the threshold period of time, to a backend device to disable a function of the transaction card. ### Claim 9 (depends on 8) The method of claim 8, wherein determining that the transaction card has been removed from the charging device for the threshold period of time comprises: receiving, from the charging device, the notification that the transaction card has been removed from the charging device for the threshold period of time. ### Claim 10 (depends on 8) The method of claim 8, wherein the charging terminal is monitored when the user device is in electrical communication with the charging terminal. ### Claim 11 (depends on 10) The method of claim 10, further comprising: providing a charge to the charging terminal, wherein the charging terminal is monitored based on providing the charge. ### Claim 12 (depends on 10) The method of claim 10, further comprising: detecting that the user device is inserted into a charging slot of the charging device, wherein the charging terminal is monitored based on detecting that the user device is inserted into the charging slot. ### Claim 13 (depends on 8) The method of claim 8, wherein the transaction card is determined to have been removed from the charging device for the threshold period of time based on a change in resistance between a supply contact and a ground contact of the charging terminal. ### Claim 14 (depends on 8) The method of claim 8, further comprising: detecting that the transaction card has been inserted into the charging device, wherein the charging terminal is monitored based on detecting that the transaction card been inserted into the charging device. ### Claim 15 A non-transitory computer-readable medium storing a set of instructions, the set of instructions comprising: one or more instructions that, when executed by one or more processors of a user device, cause the user device to: monitor a charging terminal of a charging device receiving a transaction card; determine, based on monitoring the charging terminal, that the transaction card has been removed from the charging device for a threshold period of time; and transmit a notification that the transaction card has been removed from the charging device for the threshold period of time, to a backend device to disable a function of the transaction card. ### Claim 16 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the one or more instructions, that cause the user device to determine that the transaction card has been removed from the charging device for the threshold period of time, cause the user device to: receive, from the charging device, the notification that the transaction card has been removed from the charging device for the threshold period of time. ### Claim 17 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the charging terminal is monitored when the user device is in electrical communication with the charging terminal. ### Claim 18 (depends on 17) The non-transitory computer-readable medium of claim 17, wherein the one or more instructions further cause the user device to: provide a charge to the charging terminal, wherein the charging terminal is monitored based on providing the charge. ### Claim 19 (depends on 17) The non-transitory computer-readable medium of claim 17, wherein the one or more instructions further cause the user device to: detect that the user device is inserted into a charging slot of the charging device, wherein the charging terminal is monitored based on detecting that the user device is inserted into the charging slot. ### Claim 20 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the transaction card is determined to have been removed from the charging device for the threshold period of time based on a change in resistance between a supply contact and a ground contact of the charging terminal.