The Key fob’s LED still lights up do I still need to replace the battery?

The LED on the key fob requires very little power to light up, The best way to check to see if your battery is still good or needs to be replaced is to unscrew the screws on the back of the fob, pop the battery out and use a Multi-Meter to test the battery, it should be at 3.0-3.3Volts, if it is any lower it needs to be replaced.