Hearing Aid Battery Questions



  • Zinc Air Battery ?

    Zinc Air is the most popular battery power system for hearing aids.  Through a unique construction that utilizes air from outside the battery, these batteries produce much more energy than any other battery system due to much higher energy density.  With zinc air batteries, you can expect much longer battery life than any other batteries of the same size. 

  • What are the common battery sizes?

    The most common battery sizes are 10, 312, and 13.  As the hearing aid devices get smaller, model 10 is getting more popular.  Please use the recommended size for each hearing aid.  To identify the size, manufacturers use industry standard color codes on their zinc air tabs and packaging as follows:

    Color Coding System:

     Size 10
     Size 312
     Size 13

  • How long will batteries last?

    Battery life is determined by the type and amplification of your hearing aid as well as the hours you wear your hearing aid.  Your hearing care professional can tell you the battery life you can expect.

  • What is a High Power Zinc Air battery?

    Some batteries are claimed as High Power.  These batteries can amplify signals loud enough with less distortion by providing enough current drain, which is required by some hearing aid devices.  Today, most of the batteries are capable of coping with high power requirements so that it is no longer a special feature.  iCellTech Digital Sound series are also High Power batteries at the top quality level with longer running time. 

  • Why is there a tab on my Zinc-Air battery?

    A zinc air battery uses air outside the battery as a source of power.  The factory applies a tab which seals the air holes in the battery to ensure freshness and prevent self-discharging until you are ready to use the battery.

    Do not remove the tab until you use the battery.  To activate the battery, you may simply remove the tab.  After removing the tab, wait about one minute prior to inserting the battery into your hearing aid. This allows sufficient time for the air to enter and activate the battery.

    Some users insert the batteries into their hearing aids right after they take off the tabs without proper activation time, and then find their devices do not work. Do not misinterpret this as battery failure.  This is just that the voltage has not reached high enough yet.  Just wait a few more seconds. You will find your hearing aids work very well.  Longer activation time does not mean low capacity at all. 

  • How should I store my batteries?

    You should store your hearing aid batteries at room temperature.  Avoid storing your batteries in hot places or in sunlight, as heat will shorten the life of batteries.  Do not store batteries in the fridge as it may affect battery performance and capacity. The batteries shouldn’t be exposed to excessive moisture or dry circumstances.

    Batteries should not be carried in your pocket or purse with other metal objects such as coins or keys.  It is recommended that batteries be carried in the package that you bought them in.  Keeping the batteries without correct packaging could let the batteries short circuit and reduce the battery life.

    Store and discard batteries in places where they cannot be reached by infants or children.  If a battery is swallowed, see a doctor immediately.

  • Can a Battery tester tell how long a battery is going to last?

    Many people think that a battery tester will tell you how long the battery would run.  It is not true for Zinc-Air batteries.  The battery tester for Alkaline batteries may tell you how long a battery would go, as the discharge curve of an alkaline battery is very steep.  However, zinc-air batteries have a very flat discharge curve.  Zinc-air discharges for a long time at flat voltage and then expires suddenly.  Accordingly, the ending date cannot be anticipated by using a battery tester.  Battery testers may only tell you if the battery is good or already discharged.

    Each hearing aid battery has its own characteristics per manufacturer. A battery could have low voltage measured with the tab on, or right after the tab is off and be judged as dead when it is tested.  Once again, low initial voltage has nothing to do with the performance of the batteries as the voltage goes up high enough to perform to full capacity after enough activation time.  

    * Caution.

    Some cheap testers, especially with lamp, require very high current drain to measure so that battery life could be reduced significantly when battery is measured with these poor testers.

  • Nominal voltage (1.4volt) vs. operating voltage?

    1.4 volts is a zinc air battery’s nominal voltage when measured after fully activated without any load and it can be slightly different per manufacturer.  However, the battery's actual operating voltage is less than that (such as 1.2volt or 1.25volt) when measured with load. The hearing aid device works very well as long as the battery maintains its operating voltage above 1.1 volts.  

  • Why is voltage low on a new battery?

    Zinc-Air battery starts activation right after removal of the tab on a battery.  Accordingly, voltage measured right after removal of the tab is normally lower than specified voltage of 1.4Volt.  This has nothing to do with battery capacity and you do not have to worry at all.  It will be fully activated as you use the battery.  We would like to suggest that you insert the battery into your hearing aid at least 1 minute after removal of the tab to allow for proper activation time.  Both digital and analog hearing aid machines available today provide you with clear sound if working voltage is being applied over 1.1V.

    Low voltage before activation proves how well the tabs are sealing the air holes and protecting the batteries from self-discharging.

  • How should I keep my hearing aid overnight?

    Do not store hearing aid in dry kit or small box overnight with switch turned on (battery door closed with battery in it).  It will cause howling and make continuous BEEP sound and this BEEP will make both battery and hearing aid life shortened significantly.  When hearing aid is stored in a dry kit or small box, be sure to let battery door open (switched off or remove battery).

  • What shall I do if my hearing aid does not work when new battery is replaced?

    Following are the main causes of battery problems:  

    a. Not enough time for battery to be activated after peeling off the tab.

    b. Dented battery surface causes poor contact with battery terminal of the hearing aid.

    c. Rarely, a dead battery even if it is a new one.

    d. Built up dirt on the battery terminal of the hearing aid causes poor contact.

    e. 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.