Size 675 Hearing Aid Battery

The size 675 hearing aid battery has a blue colour code and the largest volume of the four standard sizes (10, 13, 312, 675). It is about 11.6 mm in diameter and 5.4 mm thick. Thanks to its high capacity, it powers energy-hungry high-power devices for a long time. Like the other sizes, its voltage is 1.45 V.

Which devices use it?

Size 675 batteries are used in power (Power, Super Power, Ultra Power) behind-the-ear hearing aids made for severe and profound hearing loss. The Phonak Vitus + BTE UP and Phonak Naida Paradise are examples of devices that run on this battery. Some cochlear implant sound processors also use special batteries in the 675 size; for these, choose the battery recommended by the manufacturer.

How long does it last?

Average battery life is 9-20 days. Because high-power devices draw more current, battery life can vary noticeably with the device's gain, daily wearing hours, use of wireless connections and battery quality. Rechargeable batteries are also available in the 675 size; only put batteries designed for charging in a charger.

Fitting and warning signals

• Remove the protective tab and let the battery come into contact with air for 1-2 minutes.
• Open the battery door, place the + (plus) side of the battery according to the mark and close the door without forcing it; the device switches on with the door.
• When the battery is low, most devices give 3 beeps every 10 minutes; at the 0.95 V limit, sound stops with six double beeps.

Storage and safety

When the device is not in use, switch it off, take the battery out and leave the door open so that moisture can escape. Keep batteries away from children, do not throw them into fire and do not try to charge a non-rechargeable battery. Do not put used batteries in the bin; return them to the centre where you bought them.

You can get size 675 batteries from our Pendik centre. For smaller sizes see the size 13 battery page, and for all options our hearing aid batteries page.