Chevy Cobalt Battery | ACDelco Official
We engineered the ACDelco Gold 48PG to deliver OE-quality cranking power for 2005-2010 Chevy Cobalt models. This absorbed glass mat (AGM) battery provides 760 cold cranking amps and 120 reserve capacity minutes, meeting the electrical demands of your Cobalt’s alternator, starter, and accessory systems.
The 760 CCA rating delivers consistent engine cranking when temperatures drop below freezing. Cold cranking amps measure how much current a battery supplies at 0°F for 30 seconds while maintaining at least 7.2 volts.
Reserve capacity for electrical accessories
Reserve capacity measures how long a fully charged battery can supply 25 amps at 80°F before voltage drops to 10.5 volts. The 48PG’s 120-minute rating means your Cobalt’s headlights, radio, and climate control can run for two hours if the alternator fails.
This matters during highway drives when alternator failure leaves you dependent on battery power alone. Cobalt models with automatic transmissions, power steering, and ABS brakes draw approximately 18-22 amps with the engine running and accessories on. The reserve capacity buffer gives you time to reach a service facility safely.
Absorbed glass mat construction advantages
Sealed spill-proof design
The AGM separator absorbs all sulfuric acid electrolyte into fiberglass mat layers between the plates. This construction eliminates free liquid inside the case. You can mount the battery at any angle without acid leaks, though upright installation is standard for the Cobalt engine bay.
Pressure relief valves vent hydrogen gas produced during charging while preventing oxygen and moisture from entering the cells. The sealed design also stops corrosion-causing acid vapor from reaching nearby wiring harnesses and metal components.
Battery specifications for Cobalt models
Batteries for other Chevrolet models
Customer reviews
Common questions about Chevy Cobalt battery replacement
All 2005-2010 Chevy Cobalt models use Battery Council International Group Size 48. This size measures 10.94 inches long, 6.94 inches wide, and 7.50 inches tall. The ACDelco Gold 48PG matches these exact dimensions for drop-in fitment in the original battery tray.
Both the 2.2L and 2.4L Ecotec engine configurations use the same group size. The battery tray location and hold-down bracket design remained consistent across all model years in that generation.
Chevy Cobalt models require between 550-650 cold cranking amps depending on engine size and equipment level. The ACDelco Gold 48PG provides 760 CCA, exceeding minimum requirements to compensate for capacity loss as the battery ages.
Higher CCA ratings improve cold-weather starting reliability. A battery with 760 CCA retains adequate cranking power for several years even as internal resistance increases with age and use cycles.
Yes, AGM batteries are direct replacements for flooded batteries in any Chevy Cobalt. The physical dimensions and terminal configuration are identical between the two chemistries for Group Size 48.
AGM batteries offer several advantages over flooded designs including spill-proof construction, better vibration resistance, and maintenance-free operation. Your vehicle’s alternator and charging system require no modifications to charge an AGM battery properly.
ACDelco Gold batteries typically last 4-6 years in Chevy Cobalt applications depending on climate and driving patterns. The 36-month free replacement warranty covers the most common failure period.
Service life varies by region—hot climates accelerate chemical reactions that degrade battery capacity. Frequent short trips prevent full recharging, while extended parking periods allow self-discharge to drain the battery below safe thresholds. Regular highway driving in moderate climates maximizes battery longevity.
Reserve capacity measures how many minutes a fully charged battery can deliver 25 amps at 80°F before voltage drops to 10.5 volts. The ACDelco Gold 48PG’s 120-minute reserve capacity means it can power your Cobalt’s electrical systems for two hours if the alternator fails.
This specification matters most during highway driving when alternator failure leaves you dependent on battery power alone to reach a repair facility. Higher reserve capacity provides a larger safety buffer for emergency situations.
No, AGM batteries are sealed and maintenance-free. The absorbed glass mat design holds all electrolyte within the fiberglass separator material between the plates. There are no removable caps for adding water.
Pressure relief valves automatically vent any hydrogen gas produced during charging while preventing moisture and oxygen from entering the cells. This sealed construction eliminates the periodic maintenance flooded batteries require.
Yes, both the 2.2L and 2.4L Ecotec engines in 2005-2010 Chevy Cobalt models use the same Group Size 48 battery. The battery tray dimensions and mounting hardware are identical across all engine configurations.
The SS models with turbocharged 2.0L engines also use Group Size 48. Battery requirements are based on the electrical system design rather than engine displacement or performance level.