Fault symptom: Charging time is much longer than the rated value or the battery level cannot reach 100%.
Troubleshooting steps:
① When the battery level is between 99% and 100%, the charging is relatively slow. Please confirm that the device has been charged for a sufficient period of time (please refer to product specification parameters).
② Press the DISPLAY key for 10 seconds to correct the battery level.
③ After ruling out the above reasons, please contact the customer service staff for handling.
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