Dear Ford:
Twice now I leave it for about 10 days and you cannot start my f150...battery dead as a doornail (with no lights on) (great alarm system eh?)
why did they design my f150 red light on the dash to blink and kill my battery in 10 days or???

I am going to be real expensive for you. I have another car and so now I will keep calling your service to come boost the stupid thing.

Nobody is going to steal it now..nobody can start it.
james whitley

 

Something else is wrong... I leave my truck sitting for up to 2 weeks at a time, and have had no problems with it. My Explorer hadn't been run since Jan 10, and when I went out to start it the other night, it fired right up. Blinking LED or not, it shouldn't go dead after a week and a half. A steady state LED, if it was a high amperage would suck in around 30-50 mA depending on the color, and on a fully charged battery with a reserve capacity of 50 minutes at 30 amps, (1500 Amp*minutes of juice) that battery should last somewhere between 30,000 and 50,000 minutes, or in otherwords, between 20 and 34 days. Now, that's on steady... after the first 2 minutes, the LED flashes I think once every 30 seconds... Let's say, for argument's sake that it's on for a total of 6 seconds of every minute (probably an over-estimate)... that flashing LED would last 10 times as long, or somewhere between 200 days and 340 days, or 6 months to a year AT LEAST. Point being: I don't think it's the LED alone that's killing your battery...

Oh, and that's only getting it down to 10 volts at that amperage rating... to kill it completely, it would need to drain off a ton more energy...

-Joe-