Amazon.com: iFixit Battery Compatible with iPod Video 60/80 GB - Repair Kit : Electronics
Just got an iPod classic 5th gen 30gb. When I plugged it in, this came up. So, I decided to change the battery to a different one, and I still get this
How do I replace the battery in the iPod touch models?: EveryiPod.com
Apple iPod Repair Service - Best Buy
How to Replace the Battery in an iPod (1st Generation) - YouTube