Typically, a battery will keep a hearing aid powered for three to ten days before it needs replacing, depending on usage and the hearing aid style.
You’ll hear two beeps when it’s time to change the battery. This pre-warning will 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.
You may hear four beeps; this will be the last warning before the hearing aid turns off.
Once you have inserted a fresh battery the hearing aid will start up as soon as the battery drawer is closed. Jingle plays during start-up. Put 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.
A worn-out battery should be removed immediately and disposed of according to local regulations. Remember that batteries and hearing aids should be kept out of reach of children and pets.