WHAT ARE THREE SIGNS THAT MY CAR BATTERY IS FAILING?

When the battery is weak, you might notice that the engine turns over slower than usual and the dash lights flicker or go dim when you are starting your car. This happens even if the battery is fully charged after driving.
Another sign is when you operate your power windows after the engine is turned off, the windows move much slower than when the engine is running.
You also may notice that the headlights are dim when the engine is idling but become brighter when the engine is revved. Often you will also see excessive corrosion at the battery terminals and cables when the battery is getting weak.