iQOO showed off its latest fast charging system, which is capable of hitting 120 Watts. Interestingly, it’s faster than Oppo’s 125W system – when charging a 4,000 mAh battery, it needs only 15 minutes to hit 100% while the Oppo unit will take 20 minutes.

iQOO uses a slightly different setup. The charger outputs 20V at 6A, then two charge pumps inside the phone convert that to two 5V 12A currents (these pumps are slightly more efficient too, 98.5%). Oppo’s system uses three charge pumps to convert the 20V 6.25A from the adapter to 10V 12.5A.

As you can see, the two companies took…

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