Originally Posted by
expeditionph
Well if the car sits for 6 days, and you push that keypad several times a day, it draws 8 amps in lights for 3 mins, but dont forget the computer has to power down for 2 hours again, so 8 amps 3 mins, then 300 ma for 2 hours, times 10 times a day times 6 days, i am sure there is a math to a three year old battery that that is probably the problem of the drain.
3*10=.5 hours/day*6 days is 3 amp hours.
3*8amps=24 amp hours
2*10=20 hours/day*6 days is 120 amp hours.
120*.300=36 amp hours
24+36=60 amps hours over the 6 days. That's just under 7% drained from an average 900 AH rated battery.
Any half way decent battery should be able to handle this type of drain. If yours is going dead then it probably time for a new battery.