A Closer Look at the OPPO 30W VOOC 4.0 AC Charger That Shipped with the OPPO K5 Phone
The OPPO 30W VOOC 4.0 AC Charger was originally shipped with the OPPO K5 to keep the phone charged. This USB Type-A based charger supports OPPO's own brand of VOOC Flash Charge 4.0 charging scheme for up to 30 watts (5 volts @ 6 amps) output. For fastest charging, make sure to use the supplied USB Type-A to Type-C cable when connecting the charger to the phone.
The OPPO 30W VOOC 4.0 AC Charger also supports USB Power Delivery (PD) over Type-C based charging for the OPPO K5 but only up to 10 watts (5 volts @ 2 amps) so that USB PD is purposely made much slower charging than VOOC.