Q: I have the zmi 10000 mAh power bank. I was wondering how to turn off the charger.
A: If you unplug all cables attached to the battery pack, it will turn OFF on its own in 30 seconds.
You can tell it's off by observing that all the four LED lights next to the USB ports turn off in 30 seconds. By design, pressing the button one time will reveal the charge level remaining in the battery pack, and will also wake up the unit from sleep. Again, by design, the unit will shut down automatically after it's been idle for 30 seconds. Please let us know if that answers your question.