Wireless charging battery cover and Nokia's DT-900 charging pad

[Duc Thai]

Hi there,

I have a small query regarding Fully Charged with this combo (wireless charging battery door and DT-900):
With Lumia 920, charging would stop if the battery level is 100% and DT-900 will flash its LED indicator but with Note 4 the LED is constantly lighting up. They're all Qi compatible so which one breaks the standard? How do Samsung's wireless charging pad behave in this scenario?

Thanks!