1. USB charger:

　　USB charger is currently a very common and widely used type of battery charger. It uses a USB interface and is usually connected to a power outlet, computer, car charger, or portable power bank for charging. The output voltage of a USB charger is generally 5V, suitable for devices with low charging current, such as smartphones, tablets, Bluetooth earphones, etc. USB chargers come in different power specifications, such as 1A, 2.1A, 2.4A, etc. Choose the appropriate power USB charger for charging according to the device's needs.

　　2. Quick charger:

　　With the improvement of mobile device performance and the increase of battery capacity, fast chargers are gradually becoming popular. Fast chargers can provide greater charging power, allowing for battery charging to be completed in a shorter amount of time. There are currently some mainstream fast charging technologies on the market, such as Qualcomm's Quick Charge and USB Power Delivery (USB PD). These fast charging technologies can intelligently match device requirements and rechargeable battery characteristics, providing higher voltage and current outputs and accelerating charging speed. Fast chargers are usually compatible with USB chargers, but require devices that support the corresponding fast charging technology.

　　3. Wireless charger:

　　A wireless charger is a type of charger that does not require a wire interface connection. It uses the principle of electromagnetic induction to transfer electrical energy from the charger to the device, achieving wireless charging function. Wireless chargers generally use the Qi standard and can support wireless charging for various devices, including smartphones, smartwatches, and true wireless earphones. Using a wireless charger only requires placing the device in the charging area of the charger for charging, which is very convenient. The charging speed of wireless chargers is relatively slow, but they provide a more convenient way of charging in daily use.

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