Power drain, coin cell, while we're on the subject

[Ron Marcus]

Not exactly. The current drain of 40 mils will kill the battery much faster than the rated capacity. A 200 mil battery has a maximum drain rating of 15 mA/H. Over this, and the battery projected run time( and chemistry) is severly affected. A one second burn is actually a pretty long time for these critters. Using a sizeable cap will help, but size will probably be at a premium. Reducing on time is the best way to stay within specs.Look at a couple of months for a reliable estimate.

Ron

[skimask]

The one second per hour was a quicky guesstimate on my part.
10 characters @ 2400 baud once per hour is more like the real situation. Add that to some RF data-slicer set up time and the real amount would probably be more like 62ms (just a tad bit different from the one second I originally planned!).
But the math...does it sound right, feel right? Theoretically of course...
I don't really expect a coin cell to run for 2 years with my building ability...2-3-4 months would be just fine with me.
JDG