I am presently using Oppo Reno 8, I recently bought a power bank because of this infrequent power supply but I noticed that if I connect the phone to the power bank , it will be charging but the charging won't be continuous, it will be on and off, on and off, I have been bothered if it will damage the phone, I changed the cords ,the same thing repeats itself but if I connect another phone the charging will be continuous.
So what can I do to sort out the issue with using the power bank to charge my Oppo Reno 8

Try use another power bank

seaboyzen:
Try use another power bank

ok

The powerbank bank is not original,stop using it before it damage your phone.phones are expensive nowadays.

minosky:
The powerbank bank is not original,stop using it before it damage your phone.phones are expensive nowadays.

Biltong power bank, I have used their power bank before