If it is a mobile phone charger, it is already nearly charged. Flash charging should also be considered, but it is low, and now the flash charging can be 50W.
18W charging power refers to the charging power of 18W by multiplying the voltage by the current, and there are mainly 9V\/2A and 12V\/1.5A two kinds.
At present, the output current of most 18W fast charger is 2A, Meizu's 18W mCharge fast charger is Mediatek's PumpExpress fast charger, which uses 9V charging voltage and 2A charging current. The 18W charging power in the Qualcomm QC4 and USB PD fast charge protocols also uses the 9V\/2A charging output, that is, the 2A charging current.
18W charging power can be regarded as \"fast charging\
Compared to the five v2A and five v1a, 18w is fast. At present, there are 18w, 22.5w, 27w, 33w, 40w, 50w, 55w, 65w, 67w, 100w, 120w fast charging appliances on the market. These chargers are produced in different mobile phone brand manufacturers, and the mobile phone fast charge agreements they comply with are also different, but basically they are backward compatible, so the smaller the wattage of the charger, then the phone will be more suitable, I hope to help you!
If it is a mobile phone charger, it is already nearly charged. Flash charging should also be considered, but it is low, and now the flash charging can be 50W