Users of battery-powered electronic devices rely on visual battery level indicators to discern the charge status of the battery and correspondingly, available device usable time before the device needs to be plugged in. However, users with vision impairments or those not looking at the device screen may not be able to distinguish the battery level from displayed indicators. Such users may plug in the charging cable more often than necessary, out of precaution. This disclosure describes the use of a variety of audible sounds when a device is attached to a charging cable that is plugged into a power source to indicate that the device is being charged and also to indicate the current amount of charge remaining on the battery. The device operating system or other software can detect the plugged-in state as well as the battery level and play the corresponding sounds at appropriate times.
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Bicioglu, Erol; Daw, Henry; Jain, Nupur; Ellis, Josh; and Long, Hongyu, "Audible Charging Sounds to Indicate Device Battery Level", Technical Disclosure Commons, (July 13, 2023)