2. Because the Huawei charger has a higher power of 40w, and the OnePlus 9 has a charging power of 65w, the Huawei charger 40w can meet the charging requirements of the OnePlus 9.
3. In addition, Huawei charger 40w can also be charged with other devices with low power requirements, such as smart phones, tablets, etc., with good compatibility and applicability.
It can be charged only because the charging protocol is different so it can only be charged at low power