Within the last two days, my 1st Gen. ipod touch (purchased July 2008) will shut down after three to four hours. I get a message that the battery life is only at 20%. I let it shut off, kept it shut off for a while, and I recharged the battery through my USB port on my computer. The same thing happened again this morning. Within four hours, the battery was down to nothing. Of course, my one year warranty expired on the 1st of July so I don't know if I should take the ipod touch to a retail store and have the battery replaced or if I should just hold off and see if a 3rd Gen. Ipod Touch will be available in September. Suggestions?