It's not. Fast charge is only reflected in the phone and charger, and can be activated under the same charging protocol. My real phone uses OPPO's flash charge mode. So using the needle my charger can give the OPPO phone a fast charge. OPPO's charger can also fast charge your real phone. As long as their phone supports fast charge mode. But Xiaomi's and Huawei's fast charge models don't work for real phones.