I just replaced the batteries on my daughters iPod mini which failed to hold a charge. Got the batteries off Ebay:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=001&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=110112282081&rd=1&rd=1
Replaced them in about 10min. Full battery charge indicator and the battery is actually a 600mh compared to the original 400mh. And yes, the battery, like the original, is made in China.