Whereas some size change is perfectly normal, it should not be overly pronounced. If so, replace the battery immediately. A bulging coin battery may lead to device malfunction and even short-circuiting.

Operating times may vary depending on the conditions in which you use your hearing aid. The most common cause is not letting it breathe after you take off the seal. Ensure at least 60 seconds of air flow before inserting it into the hearing aid.

Panasonic hearing aid batteries, or zinc air batteries, react with air. As soon as you pull off the seal, the battery will be able to release energy. Be sure to let the battery breathe for a few minutes before inserting it into your device.

You can, but they’ll perform best in medium- to high-drain devices.

Polarity reversal may happen when more than two batteries are connected in series and used until the last moment of discharge.

Immediately head to the nearest emergency room. Avoid drinking or eating before a doctor has provided a decent diagnosis.

Panasonic zinc air batteries have been specifically designed for hearing aids, other batteries may not perform as well.

Battery lifespan greatly depends on the device and on the conditions.

Replace your battery as soon as your hearing aid no longer functions properly. If this happens unusually soon, consider checking if contact between the battery and the terminals inside is faulty.

Yes, Ni-MH rechargeable batteries can be used for (torch) lights with a wire filament.