Signs it takes disposable batteries
There is a small door on the aid that flips open. Inside sits a round battery printed with a number (10, 312, 13 or 675) and a coloured sticker tab. Your parent buys these in packs of six.
Battery & Charger Help
Hearing Aid Not Charging? Battery & Charger Help for Your Parent
If your parent's hearing aid keeps dying, the fault is usually simple and cheap to fix — and often it is the charger or battery, not the aid itself. First find out whether they use disposable batteries or a rechargeable model, because the fix is different for each. Clean the charging contacts, try a different cable, and check the case before assuming the aid is broken. If it still fails, we test every part on a known-good charger and give you an honest answer — free. Call or WhatsApp +91 9429690093.
Written & clinically reviewed by the Prudent Hearing clinical teamRCI-registered audiologists (MASLP / BASLP)Last updated 5 September 2026
Disposable vs rechargeable: which does your parent have?
Before you troubleshoot anything, find out what your parent actually wears. Older and budget aids use tiny disposable zinc-air batteries that get swapped by hand. Newer models have a sealed rechargeable cell and sit in a charging case overnight. The fix for a 'not charging' complaint is completely different for each, so start here.
Signs it is rechargeable
No battery door at all. The aids drop into a small case with metal pins or a cradle, and the case shows a charging light. There is nothing to open and no battery to buy at home.
Not sure? Send us a photo
If you cannot tell, WhatsApp us a clear photo of the aid and the case. We will identify the model and tell you exactly what your parent uses.
Message usWhy disposable batteries drain fast (and how to make them last)
Zinc-air batteries are activated by air, not just by being inserted. A few small habits explain most 'dead by lunch' complaints — and they cost nothing to fix. Share these with your parent gently; many have never been told how these cells actually work.
Peel the tab, then wait a minute
Zinc-air cells need about 60 seconds of air after the sticker comes off. Peeling and inserting immediately starts the battery weak and shortens its life.
Open the door fully at night
Flipping the battery door open overnight stops the aid drawing power. Leaving it closed is the most common reason a fresh battery is flat by afternoon.
Watch humidity and streaming
Monsoon moisture and constant phone or TV streaming both drain cells faster. Store the aids with a drying capsule and expect shorter life on heavy Bluetooth days.
Know the honest lifespan
Roughly: size 10 lasts 3-5 days, 312 about 3-7 days, and sizes 13 and 675 around one to two weeks. If your parent's batteries die far sooner than this, something is wrong — get it checked.
Rechargeable won't charge? Check the contacts, cable & case first
Most rechargeable 'failures' are not failures at all. Nine times out of ten it is dirt on the contacts, a bad cable, or the aid not seated properly. Run through these four checks before you worry about a repair — they take five minutes.
Clean the charging contacts
Earwax and skin oil coat the metal pins on the aid and in the case. Wipe both with a dry, soft cloth or the small brush that came with the aids. Never use water or alcohol.
Seat the aids properly
The case light should come on the moment the aid sits correctly. If it doesn't light, lift the aid out and reposition it until the charging light responds.
Test the cable and wall plug
Swap in a different USB cable and a different wall adapter — phone chargers vary in output. No light or a dim light usually points to power, not the hearing aid.
Give a flat battery time
A deeply drained aid may need a few minutes before the light reacts. Leave it in the case for 30 minutes, then check again before assuming the worst.
When the charger has failed — not the hearing aid
Charging cases have their own internal battery and electronics, and they wear out before the aids do. These simple swaps tell you whether the problem is the case or the device, so you don't replace the wrong thing.
One charges, one doesn't
Swap the left and right aids between the case slots. If the dead slot stays dead with the other aid in it, the case is at fault — the aid is fine.
The case won't hold power
If the case drains within a few hours off the wall, its own built-in battery is failing. The aids inside may be working perfectly.
It works on our loaner charger
Bring it in and we test the aid on a known-good charger in minutes. You get an honest answer on exactly which part failed — case, cable or aid.
Book a checkWhere to get genuine replacement batteries and chargers
Genuine parts matter more than most people think. Copy chargers can undercharge or overheat, and old grey-market batteries arrive half-dead. We stock genuine batteries and chargers for all eight brands we fit, so your parent's aid is powered the way the maker intended.
Genuine parts for all 8 brands
We supply original batteries and chargers for Signia, Phonak, Oticon, Widex, ReSound, Starkey, Unitron and Interton. Genuine chargers protect the warranty; local copies often don't.
See brandsAvoid grey-market cells
Very cheap online zinc-air batteries are often old stock with weak, unreliable life. Buy fresh, date-checked packs so a 'new' battery isn't half-flat on day one.
What it costs
Disposable battery packs are inexpensive. Replacement chargers and rechargeable cells vary a lot by brand and model, so call or WhatsApp us for an exact quote rather than guessing.
Ask for a quoteWhen to bring it in for a free repair check
If you have cleaned the contacts, tried another cable and swapped the slots and it still won't power up, it is time for a professional look. Many parents insist 'it's fine' or won't travel — which is exactly why we offer home visits. There is no charge and no obligation to buy anything.
Bring it to a clinic
Visit us in Pune (Viman Nagar), Delhi (Rohini Sector 9 or Green Park) or Bengaluru (Jayanagar 4th Block). Our RCI-registered audiologists have serviced hearing aids since 2004.
Find a clinicPrefer a home visit?
If your parent won't go out, our audiologist comes to them — home visits in Pune, Delhi and Bengaluru. Ideal for elderly parents who resist the trip.
Book a home visitFree 45-minute check
Every visit includes a free 45-minute hearing test and an honest diagnosis of the battery, charger or aid. We tell you what's actually wrong before you spend anything.
Book the free testFrequently asked questions
Why did my parent's hearing aid suddenly stop charging?
Most sudden failures are dirty contacts, a faulty USB cable or wall plug, or the aid not seated correctly in the case. Wipe the pins with a dry cloth, try a different cable and adapter, and make sure the charging light comes on. If it still won't charge, the case's own battery may have worn out — the aid itself is often fine.
How long should a rechargeable hearing aid last on one charge?
A healthy rechargeable aid typically runs for a full day on an overnight charge, though heavy Bluetooth or TV streaming shortens that. If your parent's aids die by afternoon on a full charge, the built-in cell is likely ageing and should be checked. Rechargeable cells usually hold strong for a few years before capacity fades.
How long do disposable hearing aid batteries last?
Roughly, size 10 lasts 3-5 days, size 312 about 3-7 days, and sizes 13 and 675 around one to two weeks — depending on usage and streaming. Remember to peel the tab and wait a minute before inserting, and open the battery door at night. If batteries die much faster than this, bring the aid in for a check.
Can a worn-out rechargeable battery be replaced, or do we need a new hearing aid?
In many cases the rechargeable cell or the charging case can be serviced or replaced without buying a whole new aid. It depends on the brand and model. Bring it to any of our clinics, or book a home visit, and we will tell you honestly whether a repair or replacement makes sense.
Do you repair and stock parts for all hearing aid brands?
Yes. We fit and service all eight major brands — Signia, Phonak, Oticon, Widex, ReSound, Starkey, Unitron and Interton — and stock genuine batteries and chargers for them. Genuine parts protect the warranty and charge the aid safely, unlike cheaper copies.
How much does a replacement charger or battery cost?
Disposable battery packs are inexpensive. Replacement chargers and rechargeable cells vary widely by brand and model, so we don't quote a fixed figure online. Call or WhatsApp +91 9429690093 for an exact quote for your parent's specific aid.
Still not charging? Let us check it — free.
Don't let your parent struggle with an aid that keeps dying. Bring it to any Prudent Hearing Solutions clinic in Pune, Delhi or Bengaluru, and we will test the battery, charger and aid and tell you honestly what's wrong. Every visit starts with a free 45-minute hearing test and a no-obligation repair check. If your parent would rather not travel, book a home visit in any of our three cities. Call or WhatsApp +91 9429690093 for an exact quote.
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