Which battery fits which device?
Hearing aid batteries are numbered by size and their packs are colour-coded:
- Size 10 (yellow): Small; used in invisible and in-the-canal devices.
- Size 312 (brown): Common in in-the-ear and small behind-the-ear devices.
- Size 13 (orange): Used in behind-the-ear devices; lasts longer.
- Size 675 (blue): Large; used in power behind-the-ear devices.
If you do not know your device's battery size, just bring the device or tell us its model.
How long does a battery last?
Battery life depends on the power of the device, how many hours a day you use it and how much you use wireless streaming; it is usually between a few days and two weeks. If you often connect to the phone or TV, the battery runs out sooner.
Making batteries last longer
- After removing the sticker tab, wait one minute before inserting the battery.
- Store batteries at room temperature in a dry place; do not put them in the fridge.
- Leave the battery door open when you are not using the device.
- Do not carry spare batteries in the same pocket as coins and keys.
Safety
Button batteries are dangerous if swallowed. Keep batteries out of reach of children and pets, and put used batteries in a battery recycling box.
Rechargeable devices
If changing batteries is difficult for you, rechargeable hearing aids may be an option. You can try rechargeable models at our centre.
Frequently Asked Questions
How do I find my battery size?
The battery size is printed on the battery pack and in the hearing aid's user manual. If you don't know it, bring your hearing aid in and we will look together.
How long does a hearing aid battery last?
Depending on how long you use it each day and the power of the hearing aid, it usually lasts between a few days and two weeks.
Should I keep batteries in the fridge?
No. Moisture damages batteries; store them at room temperature in a dry place.
Other Services

In-the-Ear Hearing Aid Fitting
In-the-ear hearing aids are custom made from an impression of your ear. We handle the whole process at our centre, from taking the ear impression to the first fitting and training on how to use the device.
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Ear Moulds and Earplugs
We make custom ear moulds for behind-the-ear hearing aids and protective earplugs for swimming, noise and sleep. The ear impression is taken at our centre in a few minutes.
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Instalment Payments
Credit card instalment options are available so you can plan your hearing aid payment around your budget. After the SGK (Turkey's Social Security Institution) contribution is deducted, we agree on how to pay the remaining amount together.
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