Removed the ELT control head in order to install the battery I just got in the mail yesterday. Supposedly I won't have to replace this battery for 10 years. That works for me since this was kind of a pain to do. The ELT alarm battery was installed a couple weeks ago - a much easier task.
ELT control head from the hidden side with new battery in it.
ELT control head reinstalled after installing the battery.