Q: What is the importance of a routine preventive maintenance program for the battery in your Toyota Rav4?
A: First of all, always turn off the engine and disconnect the battery's negative terminal when servicing the battery. Check the battery for corrosion, cracks, or loose parts. If corroded, remove for cleaning. Clean cable clamps with a battery brush and a warm water-baking soda solution. Ensure the battery tray is in good condition. Corroded vehicle parts should be primed and painted. Charging time should be in the charger's instructions, but a trickle charger generally takes 12 to 16 hours.