I got a CM11A computer interface from X10, it's a little white wall wart
box with a DB-9 cable to connect it to a PC and be programmed with the
This device has two AAA batteries, the instructions say they are to
maintain memory if the power goes out.
In the ActiveHome software it says the batteries will last 500 hours,
that's about three weeks. This conflicts with the instructions saying
it's just for power outages. I'd hate to think I had to change its
batteries every three weeks when it's plugged into a 110VAC outlet.
Does anyone here have experience with battery life in this unit? How
long do they last?
Thanks for your help.
The memory is EEPROM so all the batteries have to do is maintain the RTC
when power is out. They last for ages unless you have frequent, lengthy
outages. They will be more likely to leak than to run down.
"Bruce W.1" wrote:
The batteries in the CM11A are for backup to maintain the clock
during power outages. They won't be drained as long as power
is maintained. The ActiveHome software displays a battery life graph;
which is an estimate based on how much time has accumulated during
the no power state.
The batteries are likely to last more than two years unless power
is lost often and for significant duration.