Hello, OnePlus 150w Fast charge is compatible with OnePlus 65w fast charge, because the fast charge technology of OnePlus mobile phone is currently using the same supervooc protocol as oppo mobile phone, so using the 150w charger of OnePlus ace can charge OnePlus 9 series and 10pro, but the 9 series can only charge 65w at the highest. So using 150w to activate is still 65w, I hope it will help you.