I'd send it back and request a new one or a refund (see below).
Is it an official HTC part? That battery looks exactly like the one I bought from ebay for EUR15 (great deal, even included shipping from HK). It works fine (electronically), BUT with some major issues:
1) The camera opening is open (lens unprotected & dust will get in, I pasted in a bit of transparent plastic but that obviously does not help photo quality)
2) The camera snapshots now have a shadow at the side because the lens opening is too close to the thicker part where the battery is located
Effectively this makes the camera unusable. Not that quality is any good with the original HTC cover, but still...
I was wondering if you had the same problems?