Hi, I have an iPad air 1st gen, starting last week, it giving me some problem. It will auto restart once I use for about 1 minutes everytime. After restart, the battery indicator will show it has 1% left, but when I plug in to power source, it will jump to 80+%, and when I plug out the cable, it will battery will jump down to 70+%. Do you want which part have been faulty and causing this problem? Thanks

Ok, if really one of this item is the problem, how much is the cost to fix this problem? Thanks