Boot loop after battery replacement but it is charging

I replaced the battery in my Apple Watch 2 and everything seemed to go real well until I powered it up and it got stuck in a boot loop. The apple logo comes on for about 20 seconds then it turns off for 3 and repeats…over and over and over. I let it charge over night and the let it stay in a boot loop all day until the battery died and then charged it again. It does charge though so that’s something. I took it apart and checked the connections and they all seem tight. Any ideas?