This is the latest V2.0 charger, and there will still be ringing tones
Press and hold the DISPLAY key for 3 seconds, and the ring tone will disappear. This function will be implemented in V3.0
The reason for not upgrading is that there are thousands of V2.0 chips in stock
The V3.0 version is expected to be upgraded as follows: 1. After the DISPLAY key is pressed for 3 seconds, the ring tone will disappear; 2. The storage mode will be increased, and the storage voltage of the lithium ion battery will be 3.70V
It is expected that a new version of V3.0 will appear in March and April this year