Ford Focus Service Manual: Battery and Cables

Vehicles are equipped with a 12-volt, maintenance-free battery.

The battery and cable system consists of the following components:

• Battery
• Battery cable assembly
• Battery tray

The battery is a 12V DC source connected in a negative ground system. The battery case is sealed with 2 vent holes to release gases. The battery has 3 major functions:

• Engine cranking power source
• Voltage stabilizer for the electrical system
• Temporary power source when electrical loads exceed the generator output current

Ford Motor Company strongly recommends that lead-acid batteries be returned to an authorized recycling facility for disposal.