My answer is this
1.50w flash charge mobile phones are Xiaomi mobile phones, Huawei mobile phones, oppo mobile phones, vivo mobile phones.
2. Because the four mobile phones above all support 50w fast charge. It can be fully charged in as little as an hour and a half. So I think the above four mobile phones support 50w flash charge.
3. With the development of science and technology, the charging speed of mobile phones is getting faster and faster. I hope my answer can help you.