For 1990-2009 cars

The sealed battery is standard on all models. The battery is completely sealed except for two small vent holes (1) located on the side of the battery. These vent holes allow the small amount of gas produced in the battery to escape.

The battery has three major functions in the electrical system:

• | The battery provides a source of energy for cranking the engine.

• | The battery acts as a voltage stabilizer for the electrical system.

• | The battery can, for a limited time, provide energy when the electrical load exceeds the output of the generator.

The battery specifications label contains information pertinent to the servicing of the battery, such as test ratings, recommended battery replacement part numbers and service precautions. Refer to Battery Usage for additional information on battery use and original equipment replacement parts.

### Battery Ratings and Current Test

A battery has 2 ratings:

• | A reserve capacity rating at 27°C (80°F) which is an estimate of the time a fully charged battery will operate the vehicle with no generator operation.

• | A cold rating at -18°C (0°F) which indicates the cranking load capacity.

Refer to Battery Load Test .

#### Reserve Capacity

The reserve capacity is the maximum length of length of time (expressed in minutes) required for a fully charged battery to discharge to a terminal voltage of 10.5 volts direct current (VDC). All batteries are rated at a constant temperature of 27°C (80°F) and a constant drain of 25 amperes. This current drain is about the same as operating a vehicle with the headlamps on with other minimal electrical loading (radio, etc.) and no generator output.

#### Cold Cranking Amperage

The cold cranking amperage rating is the minimum amperage which must be maintained by the battery for 30 seconds while meeting a minimum voltage requirement of 7.2 VDC. All batteries are tested at -18°C (0°F).

### Electrolyte Freezing

The freezing point of the electrolyte depends on its specific gravity. Since specific gravity depends on the state of charge, the battery should be protected against freezing by keeping it in a charged condition. If the electrolyte is frozen, the battery will need to be replaced.