Frequently Asked Questions towards hearing aid batteries

The standard battery sizes are 10, 13, 312 and 675.
Easy identified by the following industry standard colours:
size 10 : yellow, size 13: orange, size 312 : brown, size 675 : blue

Hearing aid batteries use outside air as a source of power. The tab seals the air holes on the battery, ensuring freshness when purchased. After you remove the tab, the battery takes about a minute to charge fully and to be ready for use. Do not remove the tab until you are ready to use the battery; replacing the tab will not extend the battery life.

Keep batteries at room temperature. Heat can shorten their life and a damp location like the refrigerator is not recommended. Also, never carry loose batteries in your pocket or purse - contact with metal items like keys or coins can short-circuit the battery.

Keep moisture from clogging the air hole by opening the hearing aid compartment at night. Turning your hearing aid off when not in use can also extend your battery life.

Battery life is determined by length of use during the day, amplification and type of hearing aid.

Like all other batteries, hearing aid batteries should never be disposed of by burning. It’s also a good idea to keep batteries - both new and used - out of the reach of small children, who may be tempted to swallow them. Should such an accident occur, promptly take the child to a doctor.

No. The quality and design of the air electrode are the decisive factors.

• Not enough time for battery to be activated after peeling off the tab.
• Dented battery surface causes poor contact with battery terminal of the hearing aid.
• Rarely, a dead battery even if it is a new one.
• Built up dirt on the battery terminal of the hearing aid causes poor contact.
• The battery does not fit into the battery holder of the hearing aid (some battery holders are designed with a smaller cavity where the battery negative housing is placed)

lf hearing aid does not work properly after replacing with a new battery (wait one minute after peeling off the tab before use), please take your hearing aid to the service center.

Leakage after usage can happen, if a battery is exposed to deep discharge. This can happen if the discharged battery is left in the hearing aid device after end of life. Air humidity can influence the battery chemistry and lead to swelling, if it is not designed for special regional conditions the battery is used in e.g. tropical environment.

Swelling of the battery can occur when the depleted battery is left in the hearing aid and further discharged by this. Swelling can also occur when the battery is charged or when it is exposed to a climate with high air humidity.

Statistics show, that only in rare cases production failures are the reason for short running time. Mostly variable environmental influences (e.g. varying humidity, temperatures etc.) are the influencing factors on running time of the hearing aid batteries.

This subjective feeling of the users can be bemused by factors like:

• The hearing habits have changed (longer time per day, louder, new features of hearing aid have been used)
• The hearing aid was longer than usually in use, e.g. on a long movie night
• The aid is new, type or brand of the hearing aid have changed
• The new hearing aid has new features, which need more power

Also handling faults can reduce the lifetime of the battery, like:

• The battery was left long time without tab before putting it into the hearing aid (only if the hearing aid device is irregularly used)
• The hearing aid was not turned off over night or when longer time not in use
• The battery lost capacity due to short circuit at handling
• The battery was stored in a warm environment, e.g. in a car standing in the blazing sun

Further reasons for short running time could be in exceptional cases determined by production e.g. cell internal reasons under weight in of active components or cell internal micro short circuit. Also premature activation due to missing or not sufficiently sticking tab can lead to short life time.