1, low temperature will affect the battery activity, resulting in slow charging or can not be filled.
2, if the ambient temperature is normal (15℃ to 45℃) still can not charge, you can try the following methods: 1) Use the original charger connected to the home power supply to charge; 2) The non-integrated machine can be turned off to remove the battery, use a cotton swab to wipe the battery and the phone contact point, if conditions permit to replace the battery or use universal charging attempt; 3) Replace the power socket, charger, data cable charging attempt; 4) If the phone can be turned on, it is recommended to back up important data of the phone and restore the phone to factory Settings.
3. If the problem still exists and is not solved, you can bring the purchase invoice, warranty card and mobile phone to OPPO customer service center for testing, and professional engineers will solve it for you.
One reason is the charger problem, because the charger charging voltage or current does not reach the required value, this case can only change the charger.
Another reason is that the impedance of the data line is large, resulting in line loss on the charger, or there is a problem with the data line interface, resulting in the mobile phone cannot reach the normal charging limit.