Checked the internal resistance of the battery and it is >700Mohms. That is definitely the problem, should be around 8 or 10 Mohms. I ordered a new 552025 from Amazon (currently out of stock).

thanks for the good set of instructions on the take apart.

Incidentally, the grid on the back of the battery is a heater I believe, not the antenna. the 2 wire connector goes to a connection on the M/B that is labeled “heater”.

OK, I was able to see inside and see that there were a couple of pieces of double back foam tape holding them together and was able to release the back. (I hope my experience will help other ) I tested the capacitor and it measures 229 uF which is good since the rated capacitance is 220uF. the battery measures 4.01 Volts which should also be acceptable. Now I am lost as to why the live view was not available to my phone most of the time, and at times showed a green shaded picture. The problem was first noticed when someone rang my doorbell and I could not see who was there. That seems consistent with the fact that the battery comes into play when the doorbell is used (as I understand it anyway) . I wonder if the battery is dropping voltage when under load. Not sure how to test that, maybe put a resistor across it and see what happens to the voltage. Suggestions welcome. I have checked the rssi and other health parameters and all look good.

I just removed the 4 screws on the case and tried to separate the front from the back. All of the 4 sides have released their plastic clasps but there is something in the center holding the 2 sides together. I suspect it is the plastic weld under the bar code label on the back. I stretched the sides out about 3/8’\” and I am afraid I will break something if I pull on it any further. There is a depression so I peeled the label back locally and I don’t see a screw there so I think it is a weld. I bought this unit in feb 2018. Anybody else see this?

Pat