I have a brand new alternator and battery and it's not charging battery

What is your question?

I have a 2000 Mitsubishi Mirage and I just replaced the alternator and battery, and am not getting a charge. I checked the fuses and they look good still. I did not replace the alternator belt, and it has good tension on it. I did get the alternator on eBay maybe that was the issue, but I'm not sure. Some help would be appreciated, thank you.

What makes this problem better or worse?

Nothing

How long has your 2000 Mitsubishi Mirage had this problem?

Just started