Hi, I know this now because I didn’t bother to check if I could replace the battery!
I also located a local repair shop ( not the iPhone store) in St. Louis it’s in Maplewood on Edgar and Bill told me what a replacement screen would run. Around half of what the istore charges plus it’s usually done very quickly on a mid-week day. Sometimes you may have to go get lunch & come back but the are decent, nice people that don’t rob the customers. The iPhone 8 actually causes my wrist to hurt! Too wide! Trust me, I wanted more also until I had this long enough to learn I should have taken the 7 or had I known it was possible, replace battery in 5C! You can beat these overpriced, cult type places;)