Using a 200W charger and a custom build of the Xiaomi 11 Pro smartphone, Xiaomi's video, which is embedded below, can charge 10% in 44 seconds, 50% in 3 minutes and 22 seconds, and 100% in 8 minutes.
Using a 120W wireless charger, the Xiaomi charges to 10% in 1 minute and 14 seconds, 50% in 7 minutes, and 100% in 15 minutes.
Another test online by a third party actually shows even faster speeds of 6 minutes and 55 seconds to go to 100% with the wired 200W charger, and 14 mins and 17 seconds with the 120W wireless charger.
Xiaomi's existing and commercially available Mi 10 Ultra phone comes with a 120W wired charger, which charges to 100% in just under 24 minutes.
It's important to note that the Custom Build of the Xiaomi 11 Pro smartphone has a special graphene-based super-fast charging battery, instead of the silicon-oxygen negative single-cell battery its commercially available version uses, which is already an advancement over the usual lithium-ion and lithium polymer batteries in most existing smartphones.
This means the custom build of the phone is using special technology not yet available to the public, but it does show that this kind of technology is most definitely being worked on and will appear in future phones, no doubt this decade.
So, how does this compare to an iPhone, for example?
The iPhone 12 Pro takes 30 minutes to charge to 50%, 73 minutes to charge to 90% and two hours 13 minutes for a full charge, using a 20W wired charger.
Apple's 15w Magsafe charger takes 2 hours and 56 minutes to charge an iPhone 12 Pro to 100%.
If you use the original 5w charger than came with earlier iPhones, it will take 3 hours and 7 minutes to charge to 100%.
Different iPhones and Androids with different sized batteries will take different lengths of time to charge, but charging has never been faster - if you use the right kind of charging adapter.