i tried with my sister's ipod touch 4th gen with constantly wifi browsing, the battery died in about 1 hour. - also played riptide for 3 minutes and battery went down 10% (with wifi, bluetooth off) but looks like it can last a week if you only use it to listen to music, which is not the only thing you do with your ipod touch, i usually use wifi a lot (news, youtube, web) not sure if i should get one, it's stupid that they make it so thin, i don't need that extremely thin design, make it even bigger than the iphone, then put a bigger battery in it. isn't that better? FYI: my brother's ipad can last at least 10 hours of web browsing, wifi, bluetooth. its battery is freaking awesome.