Yes, rechargeable hearing aids typically have an on/off switch, just like traditional hearing aids. The on/off switch is used to turn the hearing aid on and off, conserving battery life and ensuring that the hearing aid is not accidentally left on when not in use. Some rechargeable hearing aids also have automatic on/off features, which use sensors to detect when the hearing aid is in the ear and turn on automatically, and turn off when removed. The on/off switch is usually located on the hearing aid itself, and may also be accessible through an accompanying mobile app.