Having trouble with my iPad 3 battery and charging time.

Hello experts,
I have an iPad and I recently updated to the latest iOS. Since then, I started getting some Battery issues on my device. I can use it when it is connected to the power outlet but when it is not connected, the battery energy signal is getting some error. But I noticed that this started after the update. If I connect it to my computer, it cannot be charged. But iTunes can still recognize my device and I can still sync everything. So I am thinking that this issue is due to a failure in the recent iOS update. What should I do with this now? DO I need to revert to the old iOS version?
