The entire copper assembly shown next to the spudger is glued to the battery. It will detach with light force.
DO NOT REMOVE THE SILVER SCREW HOLDING IN THE VOLUME AND ON-OFF BUTTON. If these buttons fall out there are 4 very small springs that will pop out and are very hard to reinsert. If they do pop out do not use tweezers to reinsert but use a magnetic screw driver bit to reinsert.