Hearing aid batteries
You may hear two beeps when it is time to change the battery in your hearing aids. This pre-warning may be repeated at moderate intervals until the battery runs out. This may happen shortly after the pre-warning or within the next couple of hours.
Usually the last warning before the hearing aids turn off, you may hear four beeps. Once you have inserted a new battery, the hearing aid will start up as soon as the battery drawer is closed. Make sure you place the hearing aid on immediately, as it might whistle when held in the hand.
When not in use, turn your hearing aid off by opening the battery drawer. This way you save the battery.