Frequently Asked Questions

Following Q&A will teach you everything you wanted to know about batteries and how to optimize the usage.
No. All Panasonic rechargeable batteries come pre-charged. However, due to changes in conditions and temperature during transportation, some discharge may have occurred - meaning the battery may not be at full capacity when you take them out of the package.
Any minor difference in the batteries will cause either batteries to overcompensate and to deplete faster.
Immediately head to the nearest emergency room. Avoid drinking or eating before a doctor has provided a decent diagnosis.
Replace all batteries at the same time. Do not mix old and new batteries. Use batteries from the same brand, type and expiry date too.
Polarity reversal may happen when more than two batteries are connected in series and used until the last moment of discharge.
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.
Never apply heat to batteries. Keep them away from any heat sources like heaters, candles, stoves and fires. Exposing them to too much heat could cause them to tear, leak or even explode.
Panasonic zinc air batteries have been specifically designed for hearing aids, other batteries may not perform as well.
Panasonic hearing aid batteries contain zinc, which reacts with air. They do not contain lithium.
Battery performance greatly depends on the device and on the conditions.

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