Batteries in this unit are NiCD alarm batteries which I found always are dead. The lithium memory batteries last forever evidently (9 years+), and main batteries a couple of years or so depending if the nursing staff will plug them in. The petal covers wear thin and have to be replaced annually for me (every other PM cycle). I check the gaps with the gap tool and found not likely to be off, but best to check the gap.
I hate changing the alarm batteries and grimace when I pull one out because it has nine leads that all have to be unsoldered on tiny pads through the board. Why did they use NiCD batteries for goodness sakes??
The green boards are easier than the blue ones to PM and change batteries with.
