I recently purchased a used but good condition iPod 30GB classic 5th gen. It has some minor exterior scratches, but nothing that actually affects the ipod as most of them were on the back metal section. It works well, but I'm having difficulty with the battery. The meter keeps shifting around and saying its out of power, but it'll magically "recharge" once I turn it off. I intended to use it, see how I liked it, and, if I decided I didn't need it I was going to sell it via craigslist or ebay. Has anyone experienced this before and, if so, how should I deal with it? Thanks in advance!