The charging indicator light (usually inside the scroll wheel or near the charging port) will glow while charging.

of different Pangyingo mouse models

Use a proper mouse pad; some surfaces (like glass) interfere with optical sensors.

The manual does not tell the whole story. Here is the reality of the Pangyingo mouse that the manual won't mention:

Based on user feedback, Pangyingo rechargeable wireless mice offer impressive battery longevity. One charge can last for extended periods under normal usage conditions, making them suitable for both home and office environments.

: It is recommended to use up the existing power before the first full charge.