The battery is the heart of the electrical system and the main cause of winter weather start-up woes.

Cold weather effects:

• Batteries lose about half their strength
• Increased demands on batteries
• Reduced engine-cranking power
• Thickened engine oil, which makes engine turnover difficult
• Cold fuel, which doesn't vaporize well
• Reduced battery recharging efficiency

It is extremely important to have your car's battery checked regularly by a Subaru-trained technician. Technicians look for:

• Loose or corroded connections that can dramatically diminish your car's starting power
• Loose (or crusty) connections that can shut off your car's electrical flow entirely (imitating a dead battery)

Winter driving frequently requires the use of lights, defrosters, and wipers for extended periods. This requires the charging system to work properly so it functions adequately. For this reason, your service technician should check your battery's charging system and voltage regulator and inspect your alternator to ensure components are operating properly.