iPhone 5s Battery
Mine also broke immediately. Someone else suggested that they be heated before attempting to pull out. That seems like good advice; I think the adhesive hardens with age.
My speaker was adhered to the front of the case. When I lifted it out, the coil wires unspooled and broke. When I put the new speaker in, it did not appear to seat fully. I foolishly attempted to remove it and the same thing happened again ruining the new speaker. Is there a metal piece with two holes at the bottom of the hole where the speaker goes? That appeared to be causing the speaker not to seat flush.