Why does my iPad mini 2 took 6 1/2 Hours to charge?

[iMore Question]

Why my iPad mini 2 took long to charge? It get fully charged about 6 1/2 hours? Is it normal? Pls need help. I'm using 10W USB Power Adapter.

 

[Bigeric23]

This might help you:

http://forums.imore.com/ipad/279682-why-does-my-ipad-take-so-long-charge.html