battery problem

Hi there, first time posting here. Im having an issue with my XTS 2500, its a UHF model that I use for some of my backcountry communication for work. I primarily use my HT1550 VHF. Recently my Xts has starting chirping at my when I push my PTT to talk and on some channels it just fully cuts...

My AR8200 stopped working from the AA batteries and would only work with external power. It turns out to be a rather disappointing design issue for an $800 receiver but at least the fix is fairly easy. Carefully taking it apart requires removing several VERY tiny screws including the screw on...