This usage time is based on the frequency of use. Generally speaking, the hearing aid earphone battery is lithium battery, and the capacity is relatively large, if you wear it all day, you can use two or three days, there are also more ordinary hearing AIDS with a relatively small battery capacity, it is no problem for a whole day.
If you wear it for a short time, just in the time period needed, its standby time is very long, basically can be used for a week, or even more.
Nanfu listening headphones, if the battery has power, you can always use, and Nanfu listening headphones are designed to be used for more than 15 years.