Guys, this has been bothering me for months. Sometimes fast, sometimes not at all. I asked customer service, and it was a big improvement.
I analyze
I often turn on the power saving mode, even if a little I also turn on, try not to turn on the power saving mode to charge, at least a few days do not turn on the power saving mode, and then charge. That really seems to be the problem.
Secondly, I found that there seems to be a problem after updating the system, so there is a problem with the system.
Click My Device - Check for Updates Do not update the three small dots in the top right corner to download the latest complete installation package
This is different. It fixes the system.
I downloaded it the day before yesterday, and then I can charge it quickly.
And then I'll remember it at night study and give it to everyone. I hope we can work it out, or it's gonna be a real problem.