Oppo Ace 2 has crazy-fast wireless charging

Oppo's Reno Ace smartphone, launched in Oct. 2019, has the distinction of having the fastest wired charging tech out there — its 4,000mAh battery charges from 0 to 100 percent in less than 30 minutes. 
Now, the successor to that phone, the Oppo Ace 2 (the Reno moniker apparently got lost somewhere along the way), is breaking barriers again, albeit this time with speedy wireless charging.
Oppo claims the Ace 2's 40W wireless charging technology, called AirVOOC, can charge the phone's 4