The oppo a9 does not support wireless charging.
Moreover, oppo a9 this mobile phone does not support the flash charging protocol, the original charger model of this mobile phone is: AK733YH. Input: 100-240V ~50\/60Hz 0.3A. Output: 55\/2A, not up to flash charge requirements.
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The oppo a9 is equipped with a 4020mAh large-capacity battery for a long battery life. Xiaomi 9 and iQOO these flagship mobile phone battery capacity is only 4000mAh, and a9 is not inferior to them, it can be seen that oppo is still very sincere this time.
Step 1. First of all, you need to find [Settings] in the mobile desktop and click to enter
Step 2. Next we can find the [battery] option from the page
Step 3. Then we need to turn on the switch on the right side of [wireless reverse charging]
Step 4. Finally, we just need to open the device that needs to be charged and put it on the back of the phone to start charging
The Oppo a9 phone cannot be charged wirelessly. Because this mobile phone itself is not equipped with wireless charging function, so you can't charge it with wireless charger when you use it to wireless charge, or you can buy wireless charging stickers online to do a simple alternative. This is mainly limited by the system configuration above, there is no way to solve. Wired charging only.