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 1.5 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: black&red&blueStyle: in the earPower source: built-in 300mAh batteryEquivalent input noise: 23dB &plus.
eBay
Ultra-large capacity 12V 200Ah Lithium LiFePO4 Deep Cycle Battery, for Solar/Wind Power,Small UPS,Lighting,and More
Aliexpress UK
Types:A About This Item: .
eBay
TERANTY 900mAh 2S 7.4V 80C/160C Lipo Battery indoor remote control crossing machine FPV small four axis lithium battery
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: .
eBay
1.5V AA 3400mWh rechargeable li-ion battery 1.5V AAA 900mWh battery for remote control mouse small fan Electric toy battery
Aliexpress UK
Description【Charging Function】We provide a USB charger to save you the trouble of buying batteries. The device can be easily turned on/off with the power switch. The volume can be easily adjusted by just touching the button, no tools required. And he can be charged anywhere there is a USB socket, such as company computers, home sockets, etc.【Lasting All Day】: It's time to upgrade your products and forget about always running out or replacing batteries. Now, energy-saving rechargeable batteries can provide you with longer battery life and charging intervals. Without having to change batteries all the time, you can freely do what you like【Charging Box】The machine can be fully charged in 2-3 hours, and can reach an ultra-long standby time of 35-.
eBay
3.7V 120mAh Lithium Polymer Lipo Rechargeable Battery 401230 Small Size For MP3 GPS Bbluetooth Headset video pen Camera Recorder
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. .
eBay
32850A 4.2V 10000mAh Rechargeable Li-ion Battery for Strong Light Flashlight Small Fan Large Capacity Flat Top Lithium Batteries
Aliexpress UK
Features: -It uses advanced digital signal processing technology to provide high-quality natural sound, detect and identify sound waves and change the amplification rate of the channel where the noise is located to make the sound clearer. -With volume control, it allows users to comfortably adjust the volume and tone for optimal hearing. -With a small and lightweight body (in-ear ITE design), it is very comfortable to wear on the left/right ear. -Built-in rechargeable battery, charges in 2.5 hours and can be used for 40 hours without replacing the battery. -Equipped with a portable plastic storage box (not a charging box), which is easy to carry and use anytime, anywhere. .
eBay
12V 20000mah 18650 NEW Lithium Battery Pack 3S5P large Capacity Built-in BMS 20Ah Suitable for Small Power Electronic Equipment
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
501515 3.7V 80mAh Small Size Lipo Rechargeable Battery Lithium Polymer For MP3 Bluetooth MID headset headphone video pen
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 1.5 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: black&red&blueStyle: in the earPower source: built-in 300mAh batteryEquivalent input noise: 23dB &plus.
eBay
Upgrade 12V 150Ah LiFePO4 Rechargeable Lithium Battery,️4000+ Cycles, for Small UPS, Solar Power, Fish Finder, Power Wheel
Aliexpress UK