FAQ
1.Is there a way to know if the battery is being charged or not?
Answer:
There is no direct way to know if the battery is being charged or not. BUT
you can get many time volatage in a short time, then judge the volage value.
For example: In 20 second, we get the 20 volatage value: 5.11v,
5.08V,
5.04V
5.01V
4.99v
... thus we can know the battery is charging. because the voltage value is raising