i have a 10gb 2nd gen ipod with a quoted "ten hours battery". i fully charged on sunday night and started playing. i had eq on, backlight for 2 seconds, and an itrip plugged in about half the time. the battery died today, after only 3.5 hours! if i do not use the itrip, and use a casette adapter instead, will i see a huge increase in battery life? is it the eq? or do i need to keep the backlight off to get 10 hours of battery? 3.5 isnt enough!