I bought this charger from Macmall (http://www.macmall.com/macmall/shop...iPhone-MP3 Players & Accessories&dpno=7303181) I plug it in and it starts to charge, but when I try to use it while it's charging it's laggy. Eg. When I'm swiping through my home screens it's choppy, and when I tap on an icon for a fraction of a second to swipe it will lauch the application. I've tried this on a jailbroken iPod, and a different iPod with stock 2.2.1. It says it's compatible with the second generation iPod, but I want to make sure nothing is getting messed up. Thanks.