The time has come to replace the battery in my 6GB iPod Mini. I see several kits online. I do not know which one to choose. All Google searches seem to funnel to ipodjuice.com. They have a 600mAh and a 750mAh battery. I found an 800mAh battery at ipodbatterydepot.com. Are these reputable vendors? Are they good batteries? Is there a source that you guys have had luck with?