Ford F-350 Battery Guide
Battery Specs, Group Size & Replacement Guide | 3-5 Year Average Lifespan
Proudly serving Brevard, Asheville, Hendersonville, Waynesville & Canton NC
Ford F-350 Battery Specifications
The Ford F-350 shares the same battery configuration as the F-250 — a single H8 for the gas engine and a dual-battery system for the Power Stroke diesel. The F-350's heavier towing demands may include additional electrical accessories like trailer brake controllers and auxiliary lighting that add to battery load.
| Specification | Details |
|---|---|
| Group Size | H8 (49) Gas / Dual Battery (Diesel) |
| Cold Cranking Amps (CCA) | 850 CCA (Gas) / 750+750 CCA (Diesel) |
| Voltage | 12V |
| Battery Type | AGM |
| Expected Lifespan | 3-5 years (varies with climate and usage) |
Battery Details
Battery Specifications
Group Size: H8 (49) Gas / Dual Battery (Diesel)
CCA: 850 CCA (Gas) / 750+750 CCA (Diesel)
Type: AGM
Identical battery setup to the F-250. The dual-battery diesel system provides combined cranking power for reliable diesel starting. Fifth-wheel and gooseneck towing setups may include additional electrical connections that draw from the battery system.
Warning Signs of a Failing Battery
Slow cranking — the engine turns over more slowly than usual, especially on cold mornings.
Dimming lights — headlights or interior lights appear dimmer than normal at idle.
Electrical issues — infotainment resets, clock resets, or intermittent warning lights.
Battery age — batteries over 4 years old in Western NC's climate should be tested annually.
Battery Tips for Your F-350
- Same dual-battery diesel system as the F-250 — replace both simultaneously when one fails
- Fifth-wheel and gooseneck setups with electric jacks, trailer brakes, and lighting add parasitic draw — test batteries before towing season
- DRW F-350s don't use different batteries than SRW — the electrical system is the same regardless of rear axle configuration
- Commercial F-350s with upfit equipment (utility bodies, cranes, compressors) may need auxiliary battery systems to prevent starting battery drain
- Block heaters are especially important on F-350 Power Stroke models used in early morning cold-start conditions
Battery Service at Mahon Ford
Mahon Ford offers complimentary battery testing on every service visit. Our Ford-trained technicians use professional-grade battery analyzers to measure CCA, state of charge, and internal resistance — providing an accurate picture of remaining battery life. When replacement is needed, we install Motorcraft batteries with the correct group size and CCA rating for your specific F-350 configuration.
Note on Pricing: Battery replacement cost depends on group size and battery type. Diesel models with dual batteries cost more since both should be replaced simultaneously. Call 828-884-4151 for a precise estimate for your F-350.
Other Ford F-350 Service Pages
Mahon Ford — proudly serving Brevard, Asheville, Hendersonville, Waynesville & Canton NC.
Created July 5, 2026 by MM Dealer Advocates