Nucleus® 7

My battery doesn't last as long as expected, even when it's fully charged.


  1. How old is the battery?

    Batteries are only meant to last about a year. For example, the lifespan of a rechargeable battery averages between 365-400 charge cycles. Just like any other electronic device, you should replace batteries when you need to. Note: Most people rotate multiple rechargeable batteries, so it may take more than a year to reach the 365-400 charge cycles on a single battery.
  2. Are the battery contacts clean?

    Make sure there's no dirt or dust on the battery, the charger, or the battery contacts on the sound processor. You'll find easy step-by-step pointers for how to clean these items on page 44 of your Nucleus 7 Sound Processor User Guide.
  3. Are you using disposable batteries?

    Make sure they're the ones we recommend – 675 (PR44) zinc air batteries designed for cochlear implants. Don't use silver oxide or alkaline batteries. Note: Let new disposable batteries stand for a few seconds after you peel off the plastic cover and before you put them into your sound processor.
  4. Can you try a different rechargeable battery?

    If you have another rechargeable battery, does it last longer than the one you're having trouble with? If it does, this could mean the original battery is faulty. Please contact customer support if you think your battery is faulty and still under warranty.

Need more help?

Get in touch with a member of our customer support team. We're available from 6:00am – 6:00pm MDT Monday to Friday and 8:00am – 12:00pm Saturday. Choose phone or chat and we'll take it from there.

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