OPPO mobile phone uses its own research and development of VOOC flash charging technology, is a private fast charging protocol, the use of low voltage and high current fast charging scheme, it through the special low voltage and high current charger and 7 pin contact and 8 contact battery, to achieve the 5V charging voltage unchanged, increase the charging current to 4A-5A. In addition, the VOOC flash charge uses a parallel circuit to divide and achieve multi-channel 5V charging, so OPPO VOOC technology needs to use a dedicated charging cable.