True wireless earbuds that include on-board batteries are popular. This disclosure describes techniques to balance cell aging of wireless earbuds and enable utilization of the full capacity of the battery cells of wireless earbuds. A fuel gauge value (available cell capacity) for each earbud is recorded. When the earbuds are charging, e.g., in a charging case, the fuel gauge value for each earbud is read. A cell age equalization mode is invoked if the difference between the available cell capacities meets a predetermined threshold. When the earbuds are placed in cell equalization mode, a code path may be configured to enable more frequent master-slave role switches between the earbuds, configure the earbud with the healthier cell automatically as the master earbud, and/or deactivate some compute functionality on the earbud with the weaker cell.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Hurwitz, Jonathan D., "Cell Age Balancing For Wireless Earbuds", Technical Disclosure Commons, (July 10, 2020)