My 1st gen nano is about 2 and half years old, and the battery life has come down dramatically (not that i was getting a lot in the first place) It lasts about 5-6 hours only on rockbox firmware. I'm looking for a 3rd party battery, as i really dont want to shell out a lot of money for apple's "premium" battery. Also i heard that some 3rd party batteries have longer life than the original ones. Any idea about their reliability? And how much will they cost in chennai?