Battery Replacement not Charging?

I replaced my battery yesterday using iFixIt's kit. The phone powered on at around 68%. The calibration said to drain it to 10% and then give it a full unimpeded charge. So to my delight that took basically all night until the next morning. I was thrilled with the battery lasting so long.

Then I went to charge it and sure enough it wasn't charging. I had to get to work and by time I got into work the phone had died. When I plug it in to charge the phone recognizes a cord is there, because the battery signal turns on. It does not have the lightning signal below it, but rather the one red bar. Typically this would mean that it IS charging, and then would turn on. However, it just stays stuck on that red bar and does not turn on.

I should note that I had zero charging problems before doing the replacement. I took the time to clean out the connectors and everything in case that was the issue. I've tried multiple lightning cables, and plugging directly into USB.

I have searched the help for this exact issue and have found a lot of responses about a bad battery being dead on arrival. But none around what seems to have been a good battery but isn't charging.

Summary:

• iPhone 6 not charging after replacing battery using iFixit kit
• Replacement battery worked and was at 70% before draining to 0% the next day
• Recognizes cord but stuck at charging screen
• Cleaned charging port
• Used different cables/power sources
• No charging issues before

Thank you!