Why Won T My Power Bank Charge My Phone. In some cases you might notice the fact that the power bank is not charging even though its plugged in and the LED lights are blinking. Most power banks also come with a charging status indicator.
Now you can connect the micro USB cable to the power bank and the standard USB end to the laptop or USB AC adaptor. Is the cable connect to phone securely and well fitted. If the phone is idle and goes into sleep mode that seems to be the problem.
It seems another explanation is polarity mismatch.
Power banks are almost universally rated in milliampere hours abbreviated as mAh. However they wont all charge the power bank at the same speed. If the phone is idle and goes into sleep mode that seems to be the problem. Such power cables do not support fast charging technology as the power bank requires.
