Connect Charger and Cable properly. Slow charging problems can result from an improper connection of charger and cable. Ensure that you have plugged in the cable properly and it is not loose. If it is, it will show slow charging problems. There can be a problem with the power source too.
Learn about 'A message displays when my HUAWEI phone/tablet is charging, indicating that the battery health status has degraded'. Find all usage guide, troubleshooting tips and resources for your HUAWEI product.
camera; media and so on. The default option is “Power only”. In this case, the Android smartphone simply receives its charge from the computer. Check your pairing settings and select "Connect as media" or "USB storage." Only in this case will the PC determine the Huawei Nova 3 phone as a full-fledged storage medium.
Lastly, a factory reset on the HUAWEI NOVA 3I may be necessary to get apps to work normally. HUAWEI NOVA 3I Charging Slow Or Won’t Charge – How To Fix It. If your phone is not charging properly, or the charging speed is slower than before, then follow the steps below. Make sure you are using the original charger and cable that came in the box.
مع مرور الوقت وزيادة درجة الحرارة وانماط استخدامنا السيء يتعرض nova3i للتلف وخطورة انتفاخ البطارية وتلف

Guidance on addressing issues with the fingerprint sensor or other biometric features on the device. This guide is for the Huawei nova 3i, which is equipped with a Li-Ion 3340 mAh, non-removable battery and a 6.3 inches, 97.4 cm2 (~82.2% screen-to-body ratio) display

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huawei nova 3i not charging