I do not know who come out with the stupid
idea to remove the battery and wait 10
minutes or more, the moment the battery is
removed there is no power left other than
in some small filter Capacitors, pull one
battery out, wait 1 second than reinstall,
if it still does not work, try erasing
memory via AHP.
There is nothing inside the CM15a that can
run for more than few milliseconds
unplugged and battery removed.
If you want a reliable product have a look
at the 1132CUP from Smarthome,
The CM15a RF range is very limited and has
severe hardware limitations and a
ridiculous number of software bugs. I made
a mistake to purchase this piece of junk
(CM15a with Smart macros) before looking at
the forums, so far no reply yet for a RMA
so I can get some of my moneyback.