Answer to: Whats the best adhesive for fixing chrome bezel to back housing?Best bet would be to use a similar class of glue, namely a resin. I would try an epoxy resin that's graded for metal and plastics. If you want an exact match, try: http://www.epoxies.com/adhev.htm I would personally go for 10-3008 since it is flexible, has a high shear and peel strength, can be used on metals and plastics and is impact and vibration proof.
Answer to: Gold grounding prong on motherboard affect battery life?Yes it will affect battery life - primarily because the bezel on the iphone is actually part of the antenna. The prong in question is one of 2 ground contacts for the antenna. To compensate for the damaged prong, your iphone is most likely applying full voltage to the antenna circuit. I snapped the same prong off mine and I am looking for a replacement. If I cant find one, I'm just going to adapt a gold contact from an old scrap phone. Best bet is to find the official part name or number then ebay it. I'm still looking.