Charging bank speed, usually refers to the charging speed, such as support QC3.0 turbo high voltage fast charging technology charging bank, is faster than the ordinary 5v2.1A charging speed. Increasing the power can also improve the charging speed, but now the mobile phone more than 18W is mostly private protocol fast charge. Buy the official mobile phone charging bank, and the charger can be charged to reach the highest charging power of the mobile phone. Many third-party brands maximum charging speed is PD charging protocol 18W.