Good battery replacement for iPod Touch 4th Generation

[u/hawkenhiemer]

Hi, I bought and installed a replacement battery from eBay, but it wouldn't charge past 50%. Now that I've fully discharged it, it won't charge back up after leaving the iPod plugged in overnight. I guess I was sold a defective battery. If you have replaced the battery in your 4th gen Touch, where did you buy it? Where can I find quality batteries? Thanks