Just rolling a low(1.6) or even high(12.3) voltage battery can "extend" its life - much like cleaning the contacts..PMI said:Battery may be weak. Try taking the battery out, then back in, and hold the remote as close to a window. If not, then a new battery.
I have seen someone suggest unlocking the car w. the key and letting the alarm go off, then holding the remote INSIDE the car and pushing the button... never tried that myself, but one of my two remotes seems to have very little range when the battery gets old, but the LED still flashes.