Hearing aid battery voltmeter

Batteries are an essential part of every hearing aid and provide power.

Zinc-air batteries are the most common hearing aid batteries

Zinc-air batteries are currently the most widely used batteries on the market. Tiny holes are exposed when the protective film is removed from the batteries. Removing the adhesive label will reveal tiny holes in the battery that allow oxygen to enter the battery. After the adhesive label is removed from the battery, the battery is oxidized and the battery is activated.

The hearing aid battery requires one minute to activate

If the protective film has been removed from the battery, the battery should rest for at least one minute before it is inserted into the hearing aid.

Why? As soon as you have removed the adhesive label from your hearing aid battery, it takes a certain amount of time for enough air to reach the inside of the battery. If you put the battery in your hearing aid immediately after removing the protective film, the battery will only contain a limited amount of air. This limited amount of air can cause the battery to “run out” faster because the voltage could not reach the level required to supply power. If this is the case, let more air flow into the battery to increase the voltage. That is, it is best to wait a minute before you put the battery back into the hearing aid.

Fresh hearing aid batteries instead of stocks

Our hearing aid battery manufacturer does not recommend buying batteries in stock. You will get the best results, i.e. batteries with a long service life, if you buy fresh batteries rather than accumulate large stocks. However, batteries have a shelf life of up to 4 years.

It takes up to 24 hours for your hearing aid battery to reach the optimum voltage

Watch is held up 

Our hearing aid battery packaging says that the batteries have a voltage of 1.45 volts. In addition, however, a battery with a protective film only has a voltage of 1.1-1.3 volts. As a result, as soon as the protective film is removed from the hearing aid battery, the voltage rises and supplies enough energy to operate the hearing aid after just one minute. Nevertheless, it can take up to 24 hours for the voltage of a hearing aid battery cell to rise to the maximum voltage of 1.45 volts.

The life of batteries varies

However, it is unfortunately not possible to say exactly how long a battery will last. Whereas, according to a market study, hearing aid users were asked how long their hearing aid batteries last. Accordingly, results (show from the following graph) show that battery life varies widely. Accordingly, it depends, for example, on how often you use your Bluetooth function (e.g. whether you are permanently connected to your mobile phone via Bluetooth).

Hearing aid battery size

Hearing aid battery life


3 - 10 days


3 - 12 days


6 - 14 days


9-20 days

Conclusion on battery life: Unfortunately, there is no answer that is universally valid for all hearing aid users. To find out the expected battery life, you should observe the performance over a longer period of time. Therefore, on the back of the hearing aid battery packaging, you will find factors that can affect its performance.

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Martin Kauder

Martin Kauder

Im Prinzip ja, da Schweiß stromleitend ist und zwischen dem + und – Pol der HG-Batterie nur eine schmale farbige Isolation ist (siehe Unterseite der Hörgerätebatterie). Wenn die im Batteriefach liegende Batterie durch Schweiß nass wird, ist dies allerdings auch für das gesamte HG ungünstig. Dann besser auf ein HG mit eingebautem Akku und passendem Feuchtigkeitsschutz wechseln.

Edward Hill

Edward Hill

besteht die Möglichkeit das Batterien bei Schweißeinfluss kurzschliessen wenn Schweiß die Batterien berühren?
Freundliche Grüsse
Edward Hill

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