Mike,
My google search of electric AI showed reliability problem with
'affordable' units such as what stated by Paul Bertorelli below:
===================================
I have on my answering machine here a message from a reader who bought
five
R.C. Allen electric AIs for a fleet of training/charter aircraft.


Four failed within 100 hours of use. Numerous other reports of
premature
failure, too.


That's not to say no one gets good service from these. But they seem
problematical.


No reported problems with the AIM units from BFG. They're twice as
expensive, however.


Paul Bertorelli
Aviation Consumer


http://groups-beta.google.com/group/...b?dmode=source