OPPO’s 40W fast charging is not good news for battery longevity

Back in April, OPPO launched the , a decked out phone with top of the line Snapdragon 865, a 90Hz display, an in-screen fingerprint sensor, the works. Sure, it’s not the most specced-out handset out there, but for a starting price of around $565, it’s as good as it gets.
 
The phone has a 4,000 mAh battery that supports 65W fast wired charging and 40W wireless charging. While that might sound great, the charging speeds come at a cost.
 
OPPO has apparently that the 40W tech degrades a battery to 70 percent of its capacity in the same cycles 15W charging would to 90 percent. ...