Features: -Specially designed for hearing-impaired people, more suitable for the ear canal. Even when used for a long time, there is no pain. -Your hearing aids can be charged using the detachable charging case (you will need to charge the charging case first). -Maximum gain is 117dB, suitable for moderate to severe hearing loss (see hearing loss table). -If the earmuffs are not fully inserted into the ear canal, or if the air leaks out of the earmuffs, it will cause an annoying whistling sound. We offer 3 different sizes of ear tips to reduce whistling and noise. -Super-mini size and light weight for easy carrying. Specification: .
eBay
21700 Battery 4800mAh 3.7V Lithium Ion Battery Rechargeable Battery for Flashlight DIY Electric Scooter Solar Light（1-10pcs）
Aliexpress UK
The new hearing device is 40% smaller than other model, so there is no burden to wear it. And the devices are sleek, small, and virtually invisible. They disappear into the ear canal like magic, so no one will know you're wearing them.
eBay
VariCore NCR18650B 3400mAh 3.7v 18650 USB Type-C Lithium-ion Rechargeable Battery for Electric Toy Flashlight Batteries
Aliexpress UK
Features:-It adopts a lightweight in-ear design and comes with earplugs of different sizes to ensure a tight fit, comfortable wearing and reduced howling.-The left ear is blue and the right ear is red, making it easy to tell which ear it applies to. With obvious on/off button for easy operation.-Hidden design, looks like a Bluetooth headset, so you won't feel uncomfortable.-Equipped with a 300mAh large-capacity charging box, it can be fully charged in about 30 minutes and can be used for about 6 hours. The charging box can provide 5 charges when fully charged.-Built-in intelligent digital chip, intelligent noise reduction, no fear of noisy environment, providing excellent sound quality.Specification:Maximum sound output: 118+/- 3dBSound gain: >= 35dB+.
eBay
NEW 2100mAh Full Decoded Battery for GoPro HERO13 – High-Capacity Rechargeable Action Camera Accessory
Aliexpress UK
Choose:Upgraded version(1 pair) About This Item: -Specially designed for hearing-impaired people, more suitable for the ear canal. Even when used for a long time, there is no pain. -Your hearing aids can be charged using the detachable charging case (you will need to charge the charging case first). -Maximum gain is 117dB, suitable for moderate to severe hearing loss (see hearing loss table). -If the earmuffs are not fully inserted into the ear canal, or if the air leaks out of the earmuffs, it will cause an annoying whistling sound. We offer 3 different sizes of ear tips to reduce whistling and noise. -Super-mini size and light weight for easy carrying. .
eBay
1-20PCS 1.2V 1400mAh Rechargeable Battery Prismatic 7/5 F6 NIMH Chewing Gum Gumstick Battery for Sony CD Play
Aliexpress UK
Features:-The charging case fully charges in just 60 minutes. With the charging case, you can charge your hearing aids anytime, anywhere.-It has five volume levels (20%, 40%, 60%, 80%, 100%). Click the left or right side to adjust the volume. The volume will cycle from low to high. When the volume reaches the maximum, you will hear a "beep".-It has three different listening modes. Press and hold for 3 seconds to turn on normal mode (one beep), noise reduction mode (two beeps), and outdoor mode (three beeps).-Equipped with a digital chip that can excellently capture and identify sounds, it also has intelligent noise reduction function to prevent howling and provide clear and pure audio.-Its design is similar to that of ordinary Bluetooth earphones, .
eBay
15000mAh Rechargeable Battery for JBL Battery 400 JBL Partybox Stage 320 and for JBL Xtreme 4 Bluetooth Speaker
Aliexpress UK
Features: -The volume can be easily adjusted with just a screw turn -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: .
eBay
10440 Li-ion Battery AAA 3.7V 350mAh Rechargeable Li-ion Battery for Electric Toothbrush Shaver Table Lamp Power Bank Mouse
Aliexpress UK
Mini size, bluetooth headset appearance, different from the old-fashioned hearing aids, wearing it will not let people notice any. It is also a Bluetooth headset, long press to switch to Bluetooth mode after power on.
eBay
Waterproof 12V Battery 40Ah 30Ah Rechargeable Battery 12v 18650 Lithium Batteries for Electric Sprayer Children's Car Stall Camp
Aliexpress UK
eBay
EEMB LIR2050 Rechargeable Battery With Charger(optional) 3.7V 2050 Lithium Ion Battery Lithium Cell Coin Batteries
Aliexpress UK