It took too long for my 12W USA to charge my ne...

I just bought an iPad Pro 12.9 from Apple Store. I went to charge the system with 50% battery left. I used the charger that came with the box and let it over night (about 12 hours). It shows only 58% charge. Is the charger no good or I have to do same set up first? Please advice. Thanks

最后更新：2017-09-20 00:49:00