I did it in a similar way:
Only not with fingernails, but with a thin metal tab.
When levering between the front housing and the circuit board, it made a soft cracking noise. But nothing seems to be broken.
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I used a clockmakerâs screwdriver to keep the tabs raised. The clack sounds I heard were the tabs clicking back over their pins. (I removed the cover to clean out the gunk from the mic holes.)
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I originally came to this thread because my Phonak B-70R showed no life when removed from the charger, although it the green light was showing while charging. I suspected the battery needed replacing.
However, people talking about their old batteries not lasting as long as they did made me think there might be another issue.
What I found was that if the hearing aid is not responding to being turned on, it can be reset with a process of 1. A long press (30 seconds) on the hearing aid, then return to the charger for 1 minute. This worked for me, it might be worth a try before changing a battery. This is the YouTube that explains https://www.youtube.com/watch?v=b8-1QFrWt0g
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Battery Source?
I came across these eBay sellers in China who seem to be selling a version of the replacement batteries that we need for Phonak Marvel and Paradise.
They are approximately $25 for a pair of batteries and free shipping. A better deal than Alibaba.
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Some newsâŚ
One of the HA that I repaired stopped workingâŚafter I forgot to remove it for the shower!!! The battery is still at 3.7v and charging normally. It seems that the microphones didnât like that⌠Ok another DIY project.
I bought (on Ebay) a used Phonak P90 which stopped charging for 100$ us. I successfully changed the battery and it is now back to life again. It was a lot easyer and faster. Very happy about that.
It would be very intereresting to know if someone else tryed it and how it worked.
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Hello
Iâve tried to get my internal battery replaced but cannot - purchased my Phonak Audeo from a dealer in India, received new in package aids. The dealer added an extra year warranty on top of the two year warranty. Problem is Phonak USA wonât touch aids purchased from India. Iâve tried to work w India Sonova to get the battery replaced. They wonât honor the warranty - so Iâd pay but canât ship lithium ion batteries. Do you know anyone who can replace the battery? Itâs just now hit the two year warranty. Iâve been trying to get this repaired as I need the aid as I canât hear well at all without aids. Itâs been a bit of a nightmare to get this done. Any suggestions ? Thank you
Really thatâs unacceptable, they should offer out of warranty repair?
But regardless itâs a real pain for DIY unfortunately as well, donât Lloyds do repairs, you might be lucky.
Cables clamped to battery P90
White direct at P90-battery Minus.
Dark direct at P90-battery Plus.
3 Eneloop cells (3.91 V) directly to P90 battery
P90 Battery voltage after a few minutes in parallel at the Eleloops
I also have a red LED when charging the Phonak Audeo P90.
The battery voltage of the P90 showed 2.90 V at the start of my measurement.
Although the P90 showed a charge of 3.84 V a few minutes after connecting 3 Eneloop batteries in parallel, I cannot switch on the P90.
Now i connect 4 (instead of 3) Eneloop batteries in series (5.20 V).
It is possible that the P90 battery will then be destroyed.
I wouldnât do that. You probably also destroy the P90 itself.
After a few minutes, the P90 battery (alone) showed 4.2 V.
P90 still cannot be switched on.
After inserting it into the original charger, the old error pattern appears:
Solid green for a few seconds, then solid red.
What else I can give as information for everyone:
If the P90s are charged in the charger, they are also recognised by Phonak Target and can be connected.
Sound comes from receiver if switched on. This means that the mainboard does not appear to be faulty.
Without the charger (despite P90 voltage above 4 V), the devices are not recognised in Target and will not start.
Switching off/on does not work for recognition in Target.
Why did I perform these tests?
The Eneloops connected in parallel to the P90 battery should have the same effect as a new battery in the P90 = voltage at the battery 3.9-4.5 V.
As the P90 still cannot be switched on using the buttons, I can save myself the trouble of buying a new battery (at least in my opinion).
It probably wouldnât work with a new battery either.
Yeah seems like youâve done enough to try and kick start it into life, time to let Phonak try or replace new or used from eBay.
If you can connect to target: can you run the device test in target? It might give you some information. Next step you could try to make a factory reset.
Factory reset i have done more than 1 time since it is dead.
Device test works, but shows only informations and numbers, that brings me no worthfull input.
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