Re: Alarm Backup Battery
The alarms made by Vision were available as an option, dealer fit or over-the-counter accessory kit from EA on (actually, I believe they still supply Ford even for the BA alarms). And yes, they did have a Ford decal on the case. Their big attraction from the introduction of Smartlock on EBII's was the integration with the car wiring, to allow use of the standard car keypad for disarming when unlocking the car, saving the need for a separate remote as with some other brands at the time.
When the batteries went flat on mine in my EB XR8 a few years back, I rang Vision, and they said that if I sent the unit to them, they would replace the batteries and do a functional test of the unit for around $40 (but I ended up selling the car before I got around to doing it).
BA GT #0909 - Manual, Citric Acid, Stripes, Sunroof, Premium sound, FPV Steering wheel and Mats.