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Hearing Aids Batteries

The type of the battery should be chosen depending on the power of the hearing aid. For users’ convenience all types of batteries for hearing aids are colour-coded.

Batteries size 675 – blue colour code – are intended for powerful and extra-powerful BTE hearing aids.

Batteries size 312 – brown colour code – are used with ITE and micro-BTE hearing aids

Batteries size 13 – orange colour code – are used with most programmable and digital BTE hearing aids as well as in ITE models.

Batteries size 10 – yellow colour code – are used with ITC hearing aids.

Depending upon many factors, including battery size, the power of your hearing aids and the volume at which you wear your hearing aids, they will last about one to two weeks. Make sure that you buy the appropriate size batteries. They're all color coded for your particular hearing aids. The same office you purchased your hearing aids from will carry batteries for you. The advantages of buying from your hearing healthcare practitioner are that they are almost always fresh, less expensive, and if you're part of a battery club" some offices have for patients, whatever number of batteries you need will be mailed to you as a courtesy.

All hearing aid batteries are now zinc-air, which are better for the environment than the old mercury or silver oxide batteries. Some hearing aids also run on rechargeable batteries (such as Ni-Cad) which you may inquire about.

Zinc-air batteries are activated only when you pull the tap off the flat (positive "+") side of the battery, so don't remove the tab until you're ready to use that particular battery. Once you've removed the tab, the zinc inside the battery mixes with the air coming through the tiny holes you can see on the positive side of the battery. Once this process begins, you cannot stop it. So do not try to replace the tab because it will not stop the power drainage. After you remove the tab, place it on your calendar corresponding to the date you installed it. Then, when your battery expires, you can look back and when your batteries will go dead. This is especially important, for example, if you have important social events or meetings coming up where you would never want to have your batteries go dead. Common places for exactly this to happen are in the middle of a movie, a day away from home, or a social event. Therefore, if the day you suspect your battery will be going dead is the same day you have an important engagement, and the battery is not yet dead, replace it before the event to play safe. If you do this, don't save the batteries! You risk getting these mixed up with good batteries. (Note: most batteries if you leave them sit for a few days will automatically, mini­mally recharge. You might get a few minutes life out of them, but it's not worth the confusion of knowing which batteries are which.)

Always carry spare batteries with you, since hearing aid batteries can stop abruptly with little warning (especially overnight). Most current digital hearing aids offer a "low battery" warning signal that gives you a series of beeps, indicating you have only a few minutes of power remaining. Also, your hearing professional will have a battery tester which is a handy thing to have since when trouble­shooting, you can rule out battery problems.

When changing your batteries, check to make sure that the positive side of the battery is visible before closing the battery door. A battery inserted wrong will not work, and worse, may fracture the battery door! Never try to force the battery door closed, since that may lead to damage. Check your battery contacts regularly, and if you see any corrosion (rusty), earwax (orange-brown), mildew (green), fungus (black) or evidence of battery acid (white), contact your professional.

Store your batteries in a cool, dry place, but never in a refrigerator. Cold storage will shorten their useful life. Open your battery door and/or remove the batteries when the hearing aids are not in use, such as when you retire for the night. If you don't plan to use them for an extended period, remove the batteries to prevent corrosion. You might also consider a "dry storage" box that contains moisture absorption pellets to assist in maintaining your hearing aids in a dry state. Many consumers actually store their hearing aids in such a box every night until use again the next morning.

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