The following factors may cause charge failure. Please check them one by one:
- The charging device is not suitable or it malfunctions. Please make sure the power adapter and charging cable are in good condition. The power adapter specifications are "5V/1.5A". The charging cable should not be too long (generally not longer than 1.5 m).
- The charge port is in poor contact and there may be foreign matters. Clean up foreign matters and dirt, and keep the charge port clean.
- The long-time operation leads to charge port oxidation or internal looseness. Please repair or replace the charge port immediately.
- The charging environment is not suitable; excessively high or low temperature makes charging impossible. Please move to a place with appropriate temperature for charging.