The local Apple Store was having their monthly fire sale this weekend, and thanks to the new iPod Nanos requiring some counter space I got a great deal on one of the old iPod Shuffle demo units. I decided to test the battery capacity by cycling it a few times, and discovered something interesting I’ve never heard advertised or mentioned before – they automatically pause if you unplug the headphones. I’m not sure how useful that really is, but is certainly doesn’t hurt anything; why would you want the music to continue if you can’t hear it? Unless of course you are intentionally just trying to drain the batteries like I am (which is no simple task by the way, it takes upwards of 12 hours!)
(Apparently most all of the new iPods do this, but I never noticed because I have a 3rd generation).