Oppo responds to fast-charging battery degradation allegations

Following yesterday’s post on the alleged faster battery degradation due to fast charging, Oppo has reached out to us to clarify doubts on its SuperVOOC 2.0 technology. A tech writer had recently posted a tweet alleging Oppo has confirmed that 40W fast charging can degrade a battery capacity three times faster compared to a 15W charger.

According to Oppo, its SuperVOOC 2.0 fast-charging technology conforms to industry standards. To dispel misconceptions about battery degradation, they have provided battery test results from in-house tests as well as tests by TÜV Rheinland.

The above tests were conducted on several units of Oppo Ace 2. From the numbers, Oppo’s in-house testing figures are quite similar to the results from the German independent inspection company. At 300 recharge cycles, the battery’s average maximum charge degrades to 94.1% while at 600 recharge cycles, it drops to around 91.5-91.8%.

A charge cycle is usually calculated based on a full charge, followed by a complete discharge. At 800 cycles, that’s typically more than two years of usage and Oppo’s tests reveal that it could still retain 91% charge when it’s charged via its 65W SuperVOOC 2.0 power brick (10V 6.5A). The same fast charger is also supported on the Oppo Reno Ace and the Oppo Find X2 series.

Oppo has also provided a copy of its certification from TÜV Rheinland for both its 65W wall charger and 40W wireless charger as attached below:

To recap, the Oppo Ace 2 comes with a 4,000mAh battery and the 65W SuperVOOC 2.0 charger is rated to push a full charge in just 30 minutes. Meanwhile, the Oppo Find X2 Pro is equipped with a slightly bigger 4,260mAh battery and it takes 38 minutes for a full charge. Its previous generation 50W SuperVOOC was introduced with the Oppo Find X Lamborghini Edition and it took 35 minutes to fully charge its 3,400mAh battery.

The ability to maintain more than 90% charge after 800 cycles on a 65W charger is quite impressive. We have also requested for test results for its 40W fast wireless charger. We will update this post once we have more details.