Frequently Asked Questions

Following Q&A will teach you everything you wanted to know about batteries and how to optimize the usage.
A decreased operating time could indicate that your rechargeable batteries need replacing, depending on the circumstances.
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.
Never mix batteries. Mixing batteries causes an imbalance in the energy flow. Some batteries will overcompensate this by discharging faster than usual - greatly reducing their lifespan.
The smart charge function on chargers checks the charging conditions of the batteries, the temperatures of both the batteries and the charger, etc. This allows the charger to individually charge each battery under the best conditions. This function shortens the charging time by 5% compared to the chargers without such function.
No. Do not use batteries in water or in vacuum conditions - this will cause them to rust and short-circuit.
Panasonic hearing aid batteries contain zinc, which reacts with air. They do not contain lithium.
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.
Once a seal is peeled off, the battery starts ‘breathing’ and therefore gives of energy, even if it’s not used in a hearing aid. The battery therefore won’t last until the expiry date if the seal is removed.
Polarity reversal may happen when more than two batteries are connected in series and used until the last moment of discharge.
In general, appliances are designed to match the characteristics of dry batteries and to work within the voltage range of 1.5V to 0.9V. Thanks to this characteristic, Ni-MH rechargeable batteries can be used in appliances which require alkaline batteries, even with lower initial voltage.