Replacement Battery Not Charging - Boot Loop

Well, iFIxit sent me another battery and still no luck. Same exact thing. It seems that it's not even plugged in to the watch. Just shows the apple logo for several seconds, goes dark then loops to the apple logo again. And I can still reinstall the worn out OEM and it charges and boots normally. I didn't mention in the previous post that I've tried three different batteries from Amazon. Two the leads just fell off and the third was doing the exact same thing. It's crazy to think that this many batteries could be bad! I'm stuck. What can I try to get it to work? I really can't believe I might need to trash a perfectly good watch because I can't find a battery to work.