I have just received my ipad2. I have plugged it into the main socket with all the supplied adapter etc. The ipad came on showing the charging icon plus a USB pointing to ITunes, it then turned off. If I press the on button this same thing comes on for aprox l min. then the screen goes blank. Is this just a very low battery (it does not seem to be showing any battery level when it comes on) and that is why it turns off very quickly - or is there something wrong. I have not had dealings with an ipad before so am lost. Wish Apple would supply a more detailed instruction manual (hard copy). Grateful for any help.