Before Qualcomm and MediaTek arrived with their take on charging a smartphone quickly, Oppo had unveiled its VOOC Flash Charge also charged a smartphone quickly. Unlike Qualcomm and MediaTek though, Oppo’s implementation was quite different as it did not rely on sending high voltage to the phone.

Instead, VOOC Flash Charge sends a constant 5 volts of current to the phone, which ensures less heat and lower temperature while charging. Not to be outdone by Qualcomm’s Quick Charge 3.0 and other similar new quick charging methods, Oppo today unveiled Super VOOC Flash Charge, which supercharges its already fast VOOC charging mechanism.

Oppo claims that its Super VOOC Flash Charge is capable of charging a smartphone with a 2500mAh battery in only 15 minutes. The company has achieved this by using a new low-voltage pulse-charge system and a customised battery. The latter is likely going to be a deal breaker for bringing Super VOOC to other smartphones, though its not that Oppo is ready to share this technology with other smartphone makers.

To make sure that this technology is sage, the company has developed a new algorithm to automatically regulate the amount of current flowing into the phone. Additionally, the Super VOOC Flash Charge adapter, cable and connector have been redesigned and are now made using reliable “military-grade materials.” Oppo’s Super VOOC Flash Charge works with both microUSB and USB Type-C ports. The technology is currently under final phases of testing and will be put into commercial use in the near future.