Can alkaline batteries AG13 LR44, silver batteries SR44 357 be used interchangeably with hearing aid batteries 675 PR44?

Alkaline batteries AG13, silver SR44, and zinc-air batteries 675 for hearing aids have the same dimensions, i.e., 11.6 x 5.4 mm. Can regular alkaline/silver batteries be replaced with hearing aid batteries, or vice versa?

Zinc-air batteries have a significantly higher capacity than alkaline and silver batteries of the same size, utilizing a unique technology where oxygen absorbed from the atmospheric air is used for the chemical reaction. These batteries have special stickers, the removal of which activates the activation process. From that moment, there is also a gradual loss of battery capacity. The hearing aid battery self-discharges within 2-3 months of removing the protective sticker, even if not used. Conversely, using an alkaline or silver battery instead of a zinc-air battery in a hearing aid will mean a very short operating time - often not exceeding a few hours.
The answer is: "YES", using zinc-air batteries 675 interchangeably with alkaline AG13 or silver SR44 / 357 batteries is theoretically possible, but usually uncomfortable and suboptimal.

In practice, it is not worth installing a hearing aid battery (zinc-air) e.g. in watches, remote controls, calculators, toys where we change batteries very rarely - e.g. once every few weeks. However, if our device works very briefly on alkaline batteries (e.g. a few hours, or at most a few days), and the battery compartment is not completely sealed, then the zinc-air battery will provide a significantly longer operating time.

The use of AG13 or SR44 batteries in a hearing aid may also be justified, but only in exceptional circumstances - e.g. in a high humidity environment (e.g. pool), where zinc-air batteries do not operate optimally. However, we must remember that neither alkaline nor silver batteries are designed for use in hearing aids, speech processors, or implants - in everyday use, it is essential to use zinc-air batteries.

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