Know-How

Hearing aid batteries use air as an energy source. The tab seals the air hole on the battery. Once the tab is removed, it takes approximately ten seconds before the hearing aid battery is activated and the battery compartment can be closed.

Please do not remove the tab before the hearing aid battery is used. Reattaching the tab will not prolong the service life of the battery.

Please make sure you protect the battery air hole from moisture. Switching off your hearing aid when not in use can also prolong the life of the button cell.

Like all other batteries, hearing aid batteries must never be disposed of with the household waste or by incinerating.

Please dispose of the battery in an ecologically responsible manner - at recycling points, e.g. in supermarkets, or through your hearing aid audiologist.

No. The quality and construction of the electrode are the determining factors.

• A deformed battery is causing too weak a contact in the hearing aid
• A very rare case: the hearing aid battery is empty, even though it is new
• Dirt in the battery compartment of the hearing aid is disrupting the contact
• The hearing aid battery does not fit in the battery apparatus

A hearing aid battery can leak if it is deep drained. This can happen if the discharged battery is left in the hearing aid.

Statistics show that, in the rarest of cases, the reasons for a short service life are not necessarily production faults, but rather:

• Environmental influences (e.g. humidity, temperature).
• Personal hearing habits have changed (longer period of use per day, higher noise level, new features of the hearing aid are being used).
• The hearing aid was in use longer than usual, e.g. at a long film evening.
• The hearing aid is new, or the type or brand of the hearing aid has changed.
• The new hearing aid has additional features that require more energy.

Improper handling can also reduce the service life of the hearing aid battery, e.g.:

• The battery is left for a long time without its tab before it is inserted in the hearing aid.
• The hearing aid is not switched off over night or after a long period of non-use.
• The battery loses capacity due to a short circuit when mishandled (e.g. through contact with metal objects).
• The battery is stored in a warm environment, e.g. in a car standing in the blazing sun.

Standard battery testers test the battery voltage and not the charging status. Batteries that were not yet activated, i.e. the tab was not pulled or only very recently, do not reach the nominal voltage of 1.4. In this case, the battery tester might show that the battery is “empty”. You can still use the battery for your hearing aid. It is fully charged and ready for use as the voltage is not the same as its power capacity. The battery’s nominal voltage of 1.4 V is only reached after some time. This means that the tester only shows that the battery is “full” later on. Battery testers are not suitable for checking the battery’s charging status. In fact, there is no tester on the market for measuring the capacity of zinc-air batteries as the measurement requires completely discharging the battery since capacity = power x time.

Also, many testers are highly inaccurate. These factors mean that a tester can only differentiate between a completely discharged battery and a partially discharged battery. Any statement on the actual remaining operating time of the hearing aid cannot be made this way.