MED-EL SONNET 2 Battery Charger Replacement

The battery charger for MED-EL SONNET is a replacement charging station for the RCB rechargeable batteries used with MED-EL SONNET and SONNET 2 audio processors. It holds up to four RCB batteries at once, so you can charge a full day of spares overnight.

If your current charger has stopped working, or you want a second one for work, school or travel, this unit keeps your batteries topped up. It is currently out of stock; message us on WhatsApp and we will let you know as soon as it is back.

Battery charger for MED-EL SONNET at a glance

Charges	MED-EL RCB rechargeable batteries
For processors	SONNET and SONNET 2
Capacity	Up to 4 RCB batteries at once
Price	$200
Stock	Currently out of stock; ask us on WhatsApp to be told when it is back
Dispatch	Within 24–48 hours once in stock, with tracking
Guarantee	Wrong or defective items replaced or refunded within 14 days

RCB is the name for the rechargeable battery used in the SONNET family. If your batteries say RCB and your processor says SONNET or SONNET 2, this is the charger for you.

Will this battery charger for MED-EL SONNET work with my batteries?

Battery	Charges?
SONNET RCB rechargeable batteries	Yes
SONNET 2 RCB rechargeable batteries	Yes
SONNET 3 batteries	Not listed for this item; ask us first
Disposable zinc-air batteries	No, these are single-use and must never be charged
OPUS 2 batteries	No
Cochlear or Advanced Bionics batteries	No

Check the label on your battery for RCB, and the name on your processor. If either is unclear, send us a photo on WhatsApp and we will confirm the match.

Why a second SONNET 2 charger helps

If you have a single charger and it fails, every battery goes flat within a day or two, and the processor stops working even though nothing else is wrong.

A spare battery charger for MED-EL SONNET removes that single point of failure. It is also useful as a second base: one charger at home and one at work, at a grandparent’s house or in a travel bag. Families with two SONNET wearers may want more slots at night than one charger provides.

Understanding RCB batteries

RCB is the name used for the rechargeable battery that powers the SONNET and SONNET 2. It is used in place of disposable batteries, so you can wear the processor every day without buying zinc-air cells.

SONNET rechargeable batteries are sold in more than one size, often listed as Standard and Micro. If you use more than one size, tell us before ordering so we can confirm the battery charger for MED-EL SONNET suits all of them.

• Label batteries with a number or a dot of color, so you can rotate them evenly.
• Use the oldest charged battery first, and keep newer ones as back-ups.
• Retire a battery that runs flat much sooner than the others.

Charger or battery? A quick test

When batteries stop lasting, it is easy to blame the charger. A simple test tells you which part is at fault:

1. Clean the contacts on the battery and in the charging slot with a dry cloth.
2. Charge a battery you know is fairly new.
3. Charge an older battery in a different slot at the same time.
4. Fit each one to the processor in turn and compare how long they last.

If the newer battery lasts well and the older one does not, the battery is worn. If neither charges, or the slots show no sign of charging, the battery charger for MED-EL SONNET is the likely fault.

Signs your charger needs replacing

• No lights come on when the charger is connected to power.
• Batteries come off the charger no fuller than they went on.
• Only some of the slots charge, while others stay empty.
• The indicator shows a warning that does not clear after cleaning the contacts and reseating the battery.
• The case is cracked or the power lead is damaged.

Before replacing the charger, test with a second battery. If one battery will not charge but others do, the battery may be the problem rather than the charger. Users of other processors have reported reviving a seemingly dead rechargeable battery simply by cleaning its contacts.

How to use the battery charger for MED-EL SONNET

1. Connect the charger to power as shown in the included instructions.
2. Wipe the battery contacts with a dry cloth if they look dull or dirty.
3. Place each RCB battery in a slot, contacts down, until it sits firmly.
4. Check the charger shows that charging has started.
5. Leave the batteries until the charger shows they are full.
6. Lift the batteries out and fit one to your SONNET.

Charging overnight is the easiest habit. Put the batteries on the charger when you take the processor off, and they are ready in the morning.

A charging routine that keeps you covered

A steady routine is the best way to avoid a flat battery during the day. It takes no extra time once it becomes a habit:

• Evening: take off the processor, put every used battery on the charger and the processor in the dryer.
• Morning: fit a full battery and put a second charged one in your bag.
• Weekly: wipe the battery contacts and the charging slots.

With four slots, the battery charger for MED-EL SONNET can charge a full day of batteries for one wearer, or the daily batteries for two people who share a home.

Home, work and travel

A second charger gives you options. Some people keep one at home and one at the office, so a forgotten battery never ends the day early. Others keep a spare in a travel bag that stays packed.

When traveling abroad, check that you can plug the charger into local power, and bring a plug adapter if you need one. Spare rechargeable batteries belong in your hand luggage, following your airline rules.

While the charger is out of stock

This charger is out of stock at the moment. If your current one still works, you have time to plan:

• Send us a WhatsApp message with your processor model and battery type, and we will tell you when stock returns.
• Keep your existing charger in a safe, dry place and avoid moving it around.
• Charge batteries as soon as they run flat, so you always have one full spare.

If your charger has already failed, contact your clinic for a short-term solution while you wait.

Looking after your RCB batteries

The charger and batteries work as a pair, so caring for both pays off:

• Keep batteries out of hot cars and direct sun.
• Do not carry loose batteries next to keys or coins, which can touch the contacts.
• Wipe contacts with a dry cloth if they look dull.
• Rotate batteries so they age evenly.

A battery that drops out suddenly, swells, or gets hot during use should be taken out of service straight away.

Troubleshooting

What you see	Likely cause	What to do
No lights at all	No power reaching the charger	Check the power lead, adapter and outlet
One slot does not charge	Dirty contacts or slot fault	Clean the contacts, then try another slot
A battery will not charge in any slot	Battery at end of life	Replace the battery
Batteries run flat quickly after charging	Aging batteries	Replace the oldest batteries first
Warning indicator stays on	Contact or battery fault	Clean contacts and reseat; if it persists, contact us

How to make your battery charger for MED-EL SONNET last longer

• Keep the charger on a flat, dry surface away from sinks and windows.
• Wipe the charging slots now and then with a dry cloth; never use liquids.
• Unplug it before cleaning.
• Do not wrap the power lead tightly around the charger.
• Store it in a padded pouch when traveling.

Rechargeable batteries wear out with use, so it is common to replace batteries more often than the charger. As a rough guide, rechargeable batteries usually need replacing after around a year of daily use.

Is a replacement charger safe for my SONNET batteries?

This is a third-party compatible charger made for MED-EL RCB rechargeable batteries. We are an independent spare parts supplier and are not linked to MED-EL.

Each charger is checked before dispatch. If it arrives defective or we send the wrong item, we replace it or refund you. Use it only with RCB rechargeable batteries, and never try to charge disposable batteries.

As with any charger, use it on a hard, flat surface, keep it away from water and heat, and unplug it if it ever becomes unusually hot or smells of burning. If that happens, stop using the battery charger for MED-EL SONNET and contact us.

Shipping, payment and returns for the battery charger for MED-EL SONNET

Every battery charger for MED-EL SONNET order is packed and dispatched within 24–48 hours with tracking. Delivery usually takes 12–22 business days worldwide, and duties are handled for you on most routes, so there is nothing extra to pay at the door. Shipping is free on orders over $250, which is easy to reach if you add a spare cable or charger.

Payment runs through a secure payment gateway with all major cards. If we send the wrong item, or the part arrives defective or damaged, message us within 14 days with a short video. We replace it or refund you, and we cover the return shipping. Change-of-mind returns are not accepted on hygiene-sensitive hearing parts. Full details are in our return policy.

Other MED-EL processor parts you may need

Keep your MED-EL processor working with these matching spares:

• SONNET 2 DL coil cable – for SONNET and SONNET 2 processors
• MED-EL OPUS 2 coil cable – the D coil cable for OPUS 2
• Processor dryer – nightly drying for your SONNET

Signs your old charger needs replacing

• Batteries come off the charger still showing low, or the processor warns of a low battery soon after charging.
• The charging lights flash, stay off, or show a different colour from usual.
• One slot works and another does not.
• The battery has to be wiggled or pressed for the light to come on.
• The cable or plug is worn, bent or warm to the touch.

When a charger starts to fail, it can leave RCB batteries only half charged, and you lose hours of hearing without noticing why. Replacing the charger is often cheaper than replacing several batteries that seem weak but are simply not being charged fully.

A good nightly charging routine

1. Take the RCB batteries off the SONNET processor before bed.
2. Wipe the battery contacts with a soft, dry cloth.
3. Place each battery firmly in the Battery Charger for MED-EL SONNET and check that the light comes on.
4. Keep the charger on a hard, cool surface, away from heaters, sunny windows and pillows.
5. In the morning, check each battery shows full before you leave home.

A steady routine helps every battery reach a full charge and spreads wear evenly across your batteries, so the whole set lasts longer.

Travelling with the Battery Charger for MED-EL SONNET

Pack the Battery Charger for MED-EL SONNET and its power supply in your hand luggage together with your batteries, so you can charge at the airport or hotel if a flight is delayed. Spare lithium batteries for medical devices should travel in your carry-on bag, not in checked luggage. A small plug adapter for the country you visit is usually all you need. Many families keep a second charger at a grandparent’s home, at school or at work, so a forgotten charger never means a day without sound.

Why a spare Battery Charger for MED-EL SONNET makes sense

Chargers fail without warning, and official replacements can take a week or more to arrive. Having a second Battery Charger for MED-EL SONNET means you can keep hearing while you sort out the first one. It also lets bilateral users or families with two users charge all batteries at once. For parents, a spare charger in the school bag or at the other parent’s home removes a common cause of missed hearing time.

Buying checklist for the Battery Charger for MED-EL SONNET

• Check the model printed on your SONNET processor before you order.
• Count how many batteries you charge each night.
• Add a replacement battery to the same order if your batteries are more than a year or two old.
• Keep your order email: it has your tracking number and our WhatsApp contact.

Why buy from CochlearSpare? We focus only on cochlear implant spare parts, dispatch within 24–48 hours with tracking, take payment through a secure payment gateway, and answer fitting questions on WhatsApp. CochlearSpare Ltd is a registered UK company.

battery charger for MED-EL SONNET FAQ

How many batteries does the battery charger for MED-EL SONNET hold?

It charges up to four RCB rechargeable batteries at the same time.

Is this the same as an RCB charger?

Yes. RCB is the name of the SONNET rechargeable battery, so an RCB charger and a SONNET charger mean the same thing here.

Does the SONNET 2 charger work with the first SONNET?

Yes. It charges RCB batteries for both the SONNET and SONNET 2.

Can I charge disposable batteries in it?

No. Only charge RCB rechargeable batteries. Disposable batteries must never be charged.

When will it be back in stock?

Message us on WhatsApp and we will tell you as soon as the battery charger for MED-EL SONNET is available.

My batteries do not last as long as before. Is it the charger?

Usually it is the batteries. Rechargeable batteries lose capacity with age. If new batteries also run flat early, the charger may be at fault.

How much does the MED-EL SONNET charger cost?

It is $200. Shipping is free on orders over $250, so adding a spare cable takes you over the threshold.

Can I take it on a plane?

Chargers are usually fine in hand luggage. Check your airline rules for spare rechargeable batteries.

Can I use two chargers at the same time?

Yes. A second battery charger for MED-EL SONNET is handy for families with two wearers, or for keeping one at home and one at work.

How long does delivery take?

Once in stock, we dispatch within 24–48 hours with tracking, and most orders arrive within 12–22 business days.

Questions about your MED-EL processor? Message us on WhatsApp (+1 520 473 4179) with a photo of your processor and we confirm the right part before you pay.