Recently I sent this iPad that I bought about a year ago to get it refurbished as it really needed some technical help due to the various bumps it had during the last one year. I was really happy to receive my phone after being refurbished, but since I have got it refurbished I am receiving great battery problems that I am facing it. IS it because I got it refurbished? How can I get it working again perfectly as I had it working one year before?