MED-EL
Published Mar 02, 2026 | Last Update Feb 26, 2026
23 Hours of Hearing From a Single Charge: New Rechargeable Batteries for SONNET 3
You might be exhausted. But your SONNET 3 is not. The new rechargeable batteries for SONNET 3 have more than enough energy to get you through the day. Read on for all the details.
It’s ten pm. It’s dark outside. The kids are in bed. The TV is on, and you can’t quite keep your eyes open. But your audio processor is still going strong.
That’s the idea behind the new rechargeable battery Standard Pro. Charge it once, put it on, and it will last until well after bedtime. You know… just in case you suddenly find the energy to clean the living room.
Want to know all the details? Read on for battery times, size, hands-on videos, and more.
How Long Does the Battery Last?
The rechargeable battery Standard Pro can power your SONNET 3 for up to 23 hours. That gives it the longest battery lifetime of any rechargeable BTE audio processor.
We also have the tiny rechargeable battery Micro Pro, which lasts up to 12 hours on one charge.
How Big Is SONNET 3 With the New Batteries?
SONNET 3 with the new rechargeable battery Standard Pro is 53 mm long, making it around the same size as the standard battery pack cover (used with disposable batteries). This means it sits very neatly behind the ear.
If you’re looking for something smaller, there’s also the rechargeable battery Micro Pro, which is just 41.6 mm. It makes SONNET 3 our smallest audio processor to date and is perfect for little ears.
How Do I Charge It?
Charging is easier than ever before. Just take off the battery pack cover and the rechargeable batteries glide smoothly into the charging slots. There’s even a subtle click to let you know they’re in place. You don’t need to take off the processor to charge them, and there’s a handy spot to hold the coil in place.
Both the Standard Pro and Micro Pro rechargeable batteries take about three hours to fully charge.
The charging unit itself can be powered by any CE-marked USB-C charging cable, such as the one you use with your phone.
How Do I Use the New Batteries?
The new rechargeable batteries don’t need an adapter. You just click them directly onto the audio processor and slide the cover over the top. Take a look at this hands-on video to see exactly how to assemble and charge the batteries.
Do the New Batteries Work With SONNET 2?
Yes! Both the Standard Pro and Micro Pro batteries work with SONNET 2.
SONNET 2 with the Standard Pro has a battery runtime of up to 20 hours from one charge. With the Micro Pro, you can enjoy up to 11 hours from one charge.
How Can I Order the New Batteries?
Your local MED-EL team can help you get your hands on the new batteries.
Get in Touch
Reach out to your local MED-EL team to order the new rechargeable batteries for SONNET 3.
Contact Your Local TeamOther Frequently Asked Questions
Which audio processors are the Micro Pro and Standard Pro available for?
The new rechargeable batteries are available for SONNET 2 and SONNET 3, as well as for SONNET 2 EAS and SONNET 3 EAS.
Can I use the charging unit with any USB adapter?
The charging unit has a USB-C port. By using a USB-C cable, you can use it with any CE-marked USB-C adapter. It can also be charged via other USB-C ports, such as on a computer. This makes it really handy for travelling.
Can I charge more than one battery at once?
Yes! You can charge up to two batteries at the same time. Full charging takes around 3 hours. The amber indicator light will turn off when the battery is fully charged.
I have a small child. Can they use these batteries?
Yes, both the battery pack covers for both the Standard Pro and Micro Pro have a built-in safety lock, making them tamperproof. The small, lightweight design of the Micro Pro battery makes it well-suited for little ears!
Can I use the SONNET rechargeable batteries with WaterWear?
The Standard Pro rechargeable battery can be used with WaterWear for SONNET 3. If you have SONNET 2, you can use your normal WaterWear cover with the Standard Pro.
References
MED-EL
Was this article helpful?
Thanks for your feedback.
Sign up for newsletter below for more.
Thanks for your feedback.
Please leave your message below.
Thanks for your message. We will reply as soon as possible.
Send us a message
Field is required
John Doe
Field is required
name@mail.com
Field is required
What do you think?
© MED-EL Medical Electronics. All rights reserved. The content on this website is for general informational purposes only and should not be taken as medical advice. Contact your doctor or hearing specialist to learn what type of hearing solution suits your specific needs. Not all products, features, or indications are approved in all countries.
MED-EL
MED-EL