Final answer:
The correct indication that the client understands the use of their behind-the-ear hearing aid is that they should remove the battery when it is not in use, as it extends the battery life and prevents corrosion.
Step-by-step explanation:
A nurse caring for a client who has recently started using a behind-the-ear hearing aid should recognize that the statement indicating the client understands the use of the assistive device is: b) I should remove the battery from the hearing aid when not in use. Removing the battery when the device is not in use helps to prevent battery corrosion and extend the battery life. It is not recommended to clean the earpiece daily with a cotton swab as this can push earwax deeper into the ear canal and potentially damage the hearing aid. Clients are generally advised not to wear hearing aids while sleeping for comfort and to extend the device’s lifespan. While adjusting volume is an aspect of managing a hearing aid, proper maintenance is crucial to overall function and longevity.