1S 3.7V 3400mAh Li-ion battery with JST SM 2pin connector aa charger or 3772 located on the

or 3772 located on the underside of the toothbrush handle

Built-in battery polarity auto-detection function

You will have to contact the charger manufacturer to ensure it can charge these batteries without damaging them

It provides extended runtime while reducing the need for constant replacements

Protection: No Protection

1S 3.7V 3400mAh Li-ion battery with JST SM 2pin connector aa charger or 3772 located on theThese 3. 7V lithium ion battery pack is commonly used in various portable electronic devices such as CCTV, alarm systems, tablets, handheld lighting, portable speakers, handheld gaming consoles and many more. It provides a reliable power source for these devices, allowing them to operate efficiently without being tethered to a power outlet. Additionally, these battery packs are also used in small hobby projects, remote controlled toys, and some low