Group 34/78, 800 CCA, Dual Terminal AGM. The ’34/78′ designation means this battery has the Group 34 footprint with both Group 34 and Group 78 terminal positions — making it a popular upgrade option for Ford and Dodge trucks that benefit from higher CCA and reserve capacity. Apex Auto Spare Parts stocks Group 34/78 AGM batteries ready to ship across Canada and the US.
Quick Specs
| BCI Group Size | 34/78 (dual terminal) |
| Cold Cranking Amps (CCA) | 800 |
| Reserve Capacity | 120 minutes |
| Voltage | 12V |
| Construction | AGM — sealed, maintenance-free |
| Dimensions | 10.25 in x 6.81 in x 7.88 in (260 x 173 x 200 mm) |
| Terminal Layout | Dual — both 34 and 78 terminal positions |
| Warranty | Free replacement — ask for current term |
Vehicle Compatibility
- Ford trucks and SUVs specifying Group 34, 78, or 34/78
- Dodge/Chrysler vehicles with Group 34/78 spec
- Popular as a performance upgrade for trucks with aftermarket electronics, winches, or audio
💡 Why 34/78 is popular as an upgrade: Because it includes BOTH terminal positions, it fits applications calling for Group 34 OR Group 78 — useful when upgrading CCA without worrying about cable reach.
Who Should Consider This Upgrade
- Trucks with aftermarket lighting, winches, or sound systems
- Trucks that sit for extended periods between drives — AGM holds charge longer
- Drivers in colder regions wanting extra cold-crank headroom above OEM spec
- Anyone replacing a Group 34 or Group 78 flooded battery who wants to upgrade to AGM
Installation Notes
- Confirm your battery tray accommodates the 34/78 dimensions — slightly different from straight Group 34
- Use the terminal position that matches your factory cable routing
- Torque terminal connections to manufacturer spec — overtightening can crack posts
- Apply terminal protectant spray after installation to prevent corrosion
Frequently Asked Questions
What does 34/78 mean on a battery?
It means the battery has the physical footprint of Group 34 but includes terminal posts in both Group 34 and Group 78 positions, making it compatible with applications calling for either size.
Is 800 CCA overkill for my truck?
Not necessarily — higher CCA gives you more starting headroom as the battery ages and in extreme cold. It will not damage your vehicle to have more CCA than the minimum spec.
Will this fit in a tray sized for Group 34 only?
Generally yes, since 34/78 shares the Group 34 footprint. Confirm exact dimensions against your tray before ordering if you have a tight fit.
Can I use this in a Dodge Ram with dual battery setup?
Yes, but both batteries in a dual setup should be matched — same group, age, and type. Call us if you need a matching pair.
Not sure if this battery fits your truck?
Call or WhatsApp us with your year, make & model — we confirm the correct group size and CCA before you order.
📞 +1 (512) 236-5489 💬 WhatsAppQuestion:
- What does 34/78 mean on a battery?
- Is Group 34/78 the same as Group 78?
- What’s the difference between Group 34 and Group 78 terminal positions?
- Will a Group 34/78 battery fit my Ford F-150, Silverado, or Ram?
- Is AGM worth the extra cost over a standard flooded battery?
- Can a Group 34/78 battery be mounted on its side?
- How long does an AGM battery last compared to a flooded battery?
- Is 800 CCA overkill for my truck?
- Do I need to check terminal polarity before buying a dual terminal battery?
- Can I use this battery for a winch, audio system, or lift kit truck?
