What lifetime can i expect from lithium ion batteries?

Hi, what lifetime will the new rechargable batteries in hearing aids last?
1 year, 2 years, 3 years, how many?
and i didnt put in the brand and model because it shouldn’t matter much; anyway its a new resound Q9

Phonak Marvels will supposedly last 6 years. Since they’ve only been out since December this is just speculation at this point.

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It is indeed all speculation on the battery life.

However, my Marvels’ have a 3 year warranty which covers the batteries. In addition to that, my Audi will send mine in at the 2.5 year mark for what she called “refurbishment”. As part of that process; Phonak replaces the batteries.

That should give me at least 5 years of life for my HA’s without having to worry about battery life

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My son gave me an iPhone 7 that he had used for about two years. The lithium ion battery health had fallen to about 80%, and I replaced it. The manufacture date on the battery was October 2016.

I think the thing to consider with a HA battery is that you really want it to last all day, and not have to charge it during the day to make it through. For that reason I think they are more sensitive to capacity loss.

The runtime of all lithium-ion rechargeable batteries reduces over time. The estimates are based on fresh lithium-ion rechargeable battery capacity. Under normal operating conditions, the battery will retain up to 80% of its initial capacity after 2 years of use. Preferred rechargeable hearing aid with direct streaming may interested of you.

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I am on my second Oticon miniRITE rechargeable battery and both have only lasted a few months before I started getting the battery low sound after only about 10 hours use. I always recharge overnight. Is this normal?

Do you have the zpower battery? If so that’s not lithium ion.

Yes it is the zpower. Will lithium ion work with Oticon miniRITE? If so, which type do I need?

Unfortunately, it seems this is the crappy normal for ZPower Batteries. Soon, you will be down to 4 hours of use and /or not being able to recharge at all. It was not the intended normal, but it is the way they work (Not work) for many. Be prepared, and carry disposables, or switch out to using disposables if you need to be sure your hearing aids won’t stop working due to dead battery.
You can only switch out to disposables - not lithium ion.

Oticon have agreed to replace my zpower OPN HA (7 months old) with a new lithium ion one. It looks like they have realised that zpower is a lemon.

As li ion batteries are not user replaceable, what happens when it eventually wears out too? Does anyone know whether Oticon will refurbish the HA with a new li ion battery? And how much?

Back to li-ion batteries, the expected long-term lifetime of li-ion batteries depends on how fully you charge them, how hot they get while charging and in use, how fully you discharge them, etc. Things like phones and PC are sold on the idea that you’re going to want to fully charge the device to get through the day, etc., but things like electric vehicles and NASA space satellites have very intelligent battery charge management software. See Wikipedia articles and Battery University stuff on li-ion batteries. Since I’m an old retired geezer, I take my HA’s out for a 25-minute or so break during the day and partially recharge, staying between about 30% and 60% charge during daily use. I don’t take my Samsung smartwatch, my Galaxy Note 8, or my HA’s out to work in the yard when it’s over 85 deg F in Texas.

I recently bought a really powerful EGO electric string trimmer at Home Depot with an extra 56-volt 5 Ah li-ion battery. EGO builds intelligent battery management into the battery. The charger has a fan to cool the battery while charging and if you don’t use the device for 10 days, the battery will self-discharge to 30% to preserve its long-term life (like you’re storing the thing over the winter). Maybe smartphone and PC manufacturers aren’t so smart - or maybe they are - and just love selling you a new device when your old one has a useless battery. Same for HA OEM’s with li-ion batteries?

zpower batteries are not lithium ion. They are a beast of their own, and not worth the material they are made out of.

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hi ya, my thread!
one year on with Resound Quattro Four and the rechargable batteries crapped out already. well it could be the charger. anyway on their way back to mfr.
dealer was slow on the uptake.
so lets see how long this takes.
much obliged for all the intereste responses.

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What is the life term of a rechargeable HA battery? Rechargeable cell phone batteries last 2.5 to 3 years. If I buy a rechargeable Phonak or Costco brand what will new batteries cost. I have replaced my last 2 HA after about 5 years - both w. regular batteries.

It depends on how much you stream. My last 24 with no streaming. If I stream for every hour take an hour away.

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If you buy rechargeable Phonak or KS10 from Costco, you can have them sent back to factory just before the 3 year warranty is up and they will send you aids back with new batteries for no charge (they will probably be new aids). You should get at least 3 years more out of them before they’d need to be replaced, (or you choose to get new hearing aids after 6 years.

Just like a car or a cell phone, a lot depends on how the user uses the item. For example, if you leave your HA’s or a Li-ion charger in a hot car on a summer day or you let your house get really warm in the summer and leave your HA’s in the charger all the time charging them up to 100% capacity when you’re not wearing them, the Li-ion batteries probably won’t last as long as for other folks. ReSound has claimed for the Quattro’s that they expect the original Li-ion batteries to last for 5 years of regular use (whatever that is?!), Phonak for the Marvels for 6 years of use. MDB has suggested sending the HA’s back to be “refurbished” when the warranty is about to expire and I think a lot of HCP providers buy into that. When I asked about battery longevity 2.5 years ago, my audi suggested doing that. I think Dr. Cliff has suggested that as well. My own experience is a lot of other things on an HA fail before the battery (which has never failed for any Quattro I’ve had) and ReSound always seems to furnish me a whole brand new Quattro when anything goes south. So the longevity of the rechargeable battery has been the least of my worries!

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The life of the the battery is 3-5 years. I would recommend sending it in during your final year of your Warentee to have them replaced so you could get at least 6 years out of them. As most Warentee last 3 years. If you have Oticons their rechargeable battery last the same but as of my last conversation I believe they can be changed in the Audiologist office. I understand thst you have Resound hearing aids.

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Looking for a good, even if old, thread to post a link to helpful information on maintaining rechargeable battery life for smartphones, smartwatches, and probably HA’s, too.

Computer World has an article on Is Wireless Charging Bad for Your Smartphone? The thesis of the article is that wireless charging is so easy and convenient to do that folks will be tempted when not using their phone just to lay it down on a wireless charging pad to make sure the phone always has plenty of charge to go. And that will be very bad for the long-term lifespan of the Li-ion battery since keeping such a battery at or near 100% charge all the time degrades the battery much more rapidly than staying on average around the 50% SOC range.

The article also points out that depth of discharge tremendously affects Li-ion battery lifespan. The more fully you charge and discharge the device, the fewer equivalent full-charge cycles you can expect from your battery before its performance drastically deteriorates. The article had the following graph:

Source: Is wireless charging bad for your smartphone? | Computerworld

If your device had a LiFePO4 battery, only discharging it within a 50% range might allow it to go 6,000 equivalent full-charge cycles, whereas discharging it through a 90% range would limit it to a lifespan of ~1500 full-charge cycles, 4x less than using a 50% discharge range.

And the best 50% range might be between 70% SOC and 20% SOC, not 100% to 50%, because of the deleterious effect of being at high charge states (high voltage between terminals leads to deleterious side reactions).

So, for many folks, the utility of using the full-charge range outweighs the shortened lifespan of a device. It’s just good to know what you’re getting into when you do that and that you’ll be replacing the battery or buying whole new devices sooner than you otherwise might, whether it’s a smartphone or a rechargeable HA. Theoretically, rechargeable HA’s that offer the longest runtime give you more space to play around without consuming the maximum SOC except when necessary.

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