as per lowyard suggest... try change the cable 1st

both usb port give ur that kind of problem or only one port (assuming u got 2 port)
im using pineng powerbank with 2 port
1.0A => power bank will turn off after a while if charging tablet
2.1A => power bank will turn off after a while if charging phone

but will completely charge if tablet connect to 2.1A port and phone using 1.0A

This post has been edited by yoyu: Aug 11 2018, 01:40 PM