any other reasons that this tablet can't be charged?

[preppystud]

i am thinking about changing its battery, but i am not sure if that is the real reason.

i know that a bad micro usb connection could also be the problem, but my micro usb connection seem to be fine.

other than that, what other common problems that can cause the battery not being charged at all?

 

[GSDer]

1. Charger
2. Cable
3. Micro-USB port
4. Charging circuitry
5. Battery

If you want to eliminate the first three get a wireless charger (assuming you have the 2013 model). If it still won't charge then you could try replacing the battery.