Why is there a whistling during the wearing process?. We give 3 different sizes of earplugs to reduce howling and noise. Suitable for mild to moderate severe hearing loss (Reference hearing loss map).
eBay
AA Size Recharegrable Lithium Battery 14500 3.7V LR6 AM3 Battery for Toy LED Light Small Fan Mouse Flashlight High capacity
Aliexpress UK
This heard in hearing aids is designed for old people or people with hearing problems, suitable for those people who was hearing loss or patients. User-oriented design make the hearing aids can perfect the ear.
eBay
12V 20000mah 18650 NEW Lithium Battery Pack 3S6P large Capacity Built-in BMS 20Ah Suitable for Small Power Electronic Equipment.
Aliexpress UK
About this item 【High quality】The external and internal components of our equipment are made of top-grade materials to ensure higher quality and durability. 【Low power consumption】This Hearing Aid is rechargeable and does not require the purchase of a spare battery. It consumes very little power .Just need 1.5 hours to charging, can be used for 20 hours. 【Note】Choose the correct size ear domes to prevent any feedback noise and howling. Clean your earpieces regularly to avoid any wax buildup. Wax affects the quality of the sound you since they tend to interfere with the sound. .
eBay
SR521SW AG0 LR63 SR521 379 1.5V Alkaline Button Cell Battery 10-200PCS for Watches Electronic Toys Flashlights Small Electronics
Aliexpress UK
Compatibility Phonak SDS, Phonak 4.0, Phonak Marvel & Phonak Paradise & Phonak Lumity hearing aids. Genuine Phonak Original Manufacturer Part Comfort & Secure Fit New Condition. Hearing aids and other accessories not included.
eBay
4PCS/LOT Small rechargeable battery LIR1154 3.7V 50mah soft wrapped polymer rechargeable button 3.7V for headset
Aliexpress UK
Features:-It adopts a mini size design and a Bluetooth earphone appearance, which is different from the old hearing aid and is invisible and burden-free to wear.-Built-in the latest chip to achieve the best hearing aid function and help the hearing-impaired people hear sounds normally.-With multi-level volume adjustment, you can adjust the required hearing aid volume according to your needs. After wearing and turning on the device, double-click/triple-click to adjust the volume.-It automatically enters hearing aid mode when turned on, which is easy to use and more suitable for elderly users.-It can also be used as Bluetooth earphones. After turning on, you can switch to Bluetooth mode by long pressing it. Please note that the Bluetooth headset mode only.
eBay
Durable 10/20/30 Hole CR2032 Battery Box Portable Plastic Small Battery Organizer Coin Cell Battery Storage Case
Aliexpress UK
Features:-Easy to use, the volume can be easily adjusted with the touch of a button, no tools required.-Built-in energy-saving rechargeable battery prolongs battery life and extends the time between charges, supporting all-day use.-The charging box can be fully charged in 2-3 hours, and after being fully charged, it can achieve an ultra-long standby time of 35-48 hours.-Each weighs only 3 grams, which is convenient and comfortable to wear. It comes with earplugs of different sizes to fit everyone's ears perfectly.-It adopts a compact and lightweight design, which satisfies your convenience of carrying and invisible wearing, and can be used anytime and anywhere.Specification:Colour: white&goldStyle: in the earPower source: built-in 300mAh batteryEquiv.
eBay
20-Hole CR2032 Battery Box Coin Cell Battery Storage Case Small Battery Organizer Portable Batteries Protective Holder
Aliexpress UK
Description:Fashion Shape: The device was designed by the most experienced engineers, it's exquisite, small and portable. It even looks like a Bluetooth earphone, it could be worn comfortably. Its shape can fit perfectly in your ear. The big, middle and small earplugs was provided in the package, can adapt to people with different ear canal.Easy Operation: Only one button needs to operation: Long press turn on when device is off; long press to turn off when device is on; Short press add volume when device is on, so easy. No need to replace the battery, you just pull in the standard Mini USB to recharge like mobile when you are not using it. The device will be shut down when you pull it in the box.Noise Cancelling & Great Sound Quality: The device use.
eBay
Brand new AA 1.2V rechargeable battery 600mAh Ni-MH battery suitable for remote control electric small toys alarm clock
Aliexpress UK
1 Pair Mini Invisible Hearing Aids In-Ear Digital Enhancer Voice Sound Amplifier 300mAh with Digital Display Charging Case. 【SMALL AND CONVENIENT DEVICE】It has a miniature appearance comparable to headphones, so you won't attract any unpleasant glances when using it.
eBay
XHR-2P 2.54 1800 MaH 803450 3.7V lithium polymer battery 853448 803550 small pudding
Aliexpress UK