One clear answer: the 2010 Chevy HHR uses a standard 12-volt automotive battery (lead-acid). The exact size and rating vary by engine and trim, but it is a conventional, maintenance-free 12V battery rather than a specialty or high-tech type.
Battery type and specifications
Below are the core specs and what they mean when you’re shopping or inspecting a battery for the HHR. This list covers the typical characteristics you’ll encounter.
- Battery type: 12-volt automotive lead-acid battery (most are maintenance-free sealed units).
- Group size: The HHR uses one of GM’s common battery group sizes for this era; exact size (for example, 75 or 58 family) depends on the engine and model configuration. Always verify with the current battery label or the owner's manual.
- Cold Cranking Amps (CCA): Usually around 590–700 CCA for these vehicles, depending on the specific battery, climate, and engine option.
- Voltage: 12.6 volts when fully charged; the vehicle’s charging system operates around 13.8–14.8 volts when the engine is running.
In practice, you’ll want a battery that matches or exceeds the original CCA rating and uses the correct group size to fit the tray and terminal layout.
How to identify the exact battery size for your HHR
Before buying a replacement, confirm the precise group size and rating for your specific HHR. These steps help ensure you get the correct battery for your car:
- Check the label on your current battery for the group size (all or part of a code like 75, 58, etc.) and the CCA rating.
- Consult the owner’s manual or a GM parts site using your vehicle’s VIN to pull the exact recommended battery group size.
- Compare the dimensions of the battery tray and the terminal layout to ensure a proper fit.
- When in doubt, ask at an auto parts store or a GM dealership for a battery matched to your HHR’s engine and trim.
Knowing the exact group size and CCA ensures reliable starts in your climate and preserves electrical performance across all features.
Replacement options and maintenance tips
Considering replacement? Here are practical tips to pick a dependable battery and keep it performing well:
- Choose a reputable brand (for GM vehicles, ACDelco is a common OEM-equivalent option; other brands with solid warranties are acceptable).
- Match or exceed the original CCA rating and group size; do not install a battery that doesn’t fit the tray or misaligns with the terminals.
- Opt for a maintenance-free, sealed lead-acid unit to minimize spills and maintenance, unless you live in extreme conditions where a different spec might be advised.
- Check the warranty period; many batteries come with a 2–4 year warranty depending on retailer and region.
With the right battery, the HHR should start reliably and maintain electrical systems such as lights, PCM power, and accessories without issue.
Summary: The 2010 Chevy HHR uses a standard 12-volt lead-acid automotive battery. The exact group size and CCA rating vary by engine and trim, so verify the label, owner's manual, or VIN-specific specs to select the correct replacement. When replacing, choose a battery that matches the required group size and ≥ the original CCA, and opt for a reputable brand with a solid warranty.