Yes, you can turn on flash charging by following the following methods:

1. Go to phone settings--more settings--dual-engine flash charging--after turning on dual-engine flash charging You can use the flash charging function to charge quickly.

2. Vivo X7 supports dual-engine flash charging and needs to use the original charger (9V2A) to use the flash charging function. After turning on this function, charging is also effective when the phone is turned off.