Battery Size Group 65

Group Size 65 Battery: Big Power for Big Vehicles in Canadian Conditions

The Group Size 65 battery is one of the go-to choices for full-size trucks, SUVs, and work vehicles that demand strong cranking power and long-lasting durability. Whether you're firing up a V8 engine on a snowy Alberta morning or powering a vehicle loaded with electronics and accessories, the 65 delivers dependable performance built for Canadian driving conditions.

Size, Specs, and Price in Canada

The Group 65 battery is a large-format 12-volt battery, designed for vehicles with high electrical demands. It typically measures around 12.06 inches long, 7.5 inches wide, and 7.6 inches high.

Average specs for a Group 65 battery include:

Cold Cranking Amps (CCA): 750 to 950
Cranking Amps (CA): 875 to 1000
Amp-Hour (Ah): 70 to 85Ah

In Canada, pricing ranges from $180 to $280, depending on the battery brand, warranty, and whether it’s flooded or AGM. Most options offer a 3-year free replacement warranty, which is excellent for heavy-duty use.

Vehicles That Commonly Use Group 65 Batteries

Group 65 batteries are commonly found in:

Ford F-150, F-250, and Expedition
Chevrolet Silverado 1500 and Suburban
GMC Sierra and Yukon
Dodge Ram (older models)
Lincoln Navigator and Mercury Grand Marquis

If you're not sure whether your truck or SUV uses this battery, you can double-check your owner’s manual or visit our Truck Battery Replacement page for more help.

Alternative Battery Sizes for Group 65

If Group 65 is out of stock, here are a few similar options that may work—just confirm tray size, terminal position, and hold-down compatibility:

Group 34/78 – Similar power output but smaller in size Dimensions: 10.25" x 6.81" x 7.88"
Group 31 – Larger commercial-grade battery; may fit with tray mods Dimensions: 13.00" x 6.75" x 9.44"
Group 27 – Slightly smaller but often acceptable for light-duty use Dimensions: 12.06" x 6.81" x 8.88"

Need help with cross-compatibility? Visit How It Works for info on how we match the right battery for your vehicle.

Signs Your Group 65 Battery Needs Replacing

These are common signs your battery might be nearing the end of its life:

Engine cranks slowly or requires a boost to start
Dashboard warning light or dim headlights
Voltage reads under 12.4V at rest or under 9.6V while starting
Electrical issues, especially under load (defrost, radio, lights)

If you're unsure or don’t have a tester, MobileBattery offers mobile testing and replacement in cities like Vancouver, Calgary, and Toronto.

Group 65 Battery Lifespan in Canada

Thanks to our cold winters and wide seasonal swings, a Group Size 65 battery typically lasts 3 to 5 years in Canada. If your vehicle is working hard—towing, idling for long periods, or powering electronics—it’s smart to test your battery annually after year three.

To check if we service your area, visit our Where We Service page.

Need a Group Size 65 Battery Replacement?

Book online now at bookonline.mobilebattery.ca for fast, professional Group 65 battery replacement—at your home, job site, or roadside across Canada.