I recently picked up a Midland 75-785 handheld CB at Goodwill for $6, and thought I would see how it worked. I’ve thought several times about taking the HAM exam, and figured I might want to start out using a CB, repairing a CB, etc. I got the unit home, and fired it up, and it seemed to work okay with a simple 50R rubber duck antenna I got off my scanner. One thing that didn’t seem to work, however, was the battery charging circuit. I had some older Ni-Cad batteries to try in the unit, but they would quickly drain, and worse, the charging circuit didn’t seem to work (plugging it into my bench power supply, it would draw about 150mA at 13.8V, then quickly ramp down to 10mA, and sit there. Never really charging.
So, being one to never throw something out without first trying to fix it, I took the thing apart! Which consisted of 4 screws on the back piece, then another screw hidden under a battery spring on the remaining battery holder. Taking the board out is a bit challenging, but nothing is holding it in, you just have to work it past the case.