Redmi K40 uses flash charging technology to support 33W wired flash charging and 27W wireless flash charging, which can be quickly charged in a short time to provide a more convenient charging experience. It can charge the phone to about 50% in 30 minutes, and also supports the fast charging protection function, effectively extending the battery life, and bringing users a more convenient and safe charging experience. Therefore, the Redmi K40 uses flash charging technology.
OPPOr17 is a vooc flash charging technology launched by OPPO, which uses a 5V\/4A charger with 20W charging power and 3500mah charging capacity. The k40 supports 33 watts of fast charge