Both are fast charging technologies, but the implementation methods are different. OPPO VOOC flash charging is a low-voltage, high-current fast charge with low temperature during charging and is safer. QC3.0 is a high-pressure, low-current fast charger. The temperature is slightly higher during charging, but it has lower requirements on wires and is more convenient. Flash charging is a fast charging technology that can fully charge a mobile phone in a short time. It was independently developed by OPPO and applied for 18 patents. It increases the fastest charging speed by more than 4 times and has an impeccable intelligent full-terminal technology. Level 5 protection. Flash charging uses a low-voltage, high-current mode to increase current, and an MCU single-chip microcomputer is added to the charger power supply and battery circuit to replace the voltage-reducing circuit. Under the premise of low voltage and high current, the output of segmented cross-current current is realized through the open voltage loop. A charging method that can bring the battery to or near a fully charged state within 1 to 5 hours. It is often used for charging traction batteries when they need to be restored to full charge within a short period of time. Fast charging is detrimental to battery performance and life.