2023 Ram 2500 Battery Size & Group
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Quick answer
- BCI Group Size: H7 (also called 94R)
- Cold Cranking Amps (CCA): 800-850 CCA
- Reserve Capacity (RC): 140 minutes
- AGM vs Flooded: AGM is required.
- Terminal Layout: Right-hand positive
- Physical Dimensions (approximate): 12.4" L x 6.9" W x 7.5" H
- Dual-battery setup: All diesel models come with a dual-battery setup.
Replacement battery options
- Interstate: MTX-94R/H7
- Optima: DH7 YELLOWTOP
- DieHard: Platinum AGM H7-AGM
- Odyssey: ODP-AGM94R H7 L4
- ACDelco: 94RAGM
AGM vs flooded — which does this vehicle need?
The 2023 Ram 2500 requires an Absorbent Glass Mat (AGM) battery. The electrical system in this truck is designed for the specific power delivery and cycling capabilities of AGM batteries. Using a standard flooded battery can lead to electrical system faults, poor performance, and a significantly shorter battery life.
Post-installation relearn / reset procedure
After replacing the battery in your 2023 Ram 2500, you may need to perform a reset procedure to ensure all electrical systems are functioning correctly. This usually involves the following steps:
- Turn the ignition to the "ON" position (without starting the engine).
- Leave the ignition on for 10 seconds.
- Turn the ignition "OFF" and wait 10 seconds.
- Start the engine.
This procedure allows the vehicle's computer to relearn the battery's state of charge and other parameters.
Signs of a failing battery
- Slow engine crank: The engine turns over more slowly than usual when you try to start it.
- Dimming lights: The headlights and interior lights dim when the engine is idling or when you use accessories like the power windows.
- Warning lights: The battery or check engine light may illuminate on the dashboard.
- Corrosion: You may see a white, powdery substance on the battery terminals.
Common battery issues for this generation
The most common battery issue for this generation of Ram 2500 is premature failure due to the high electrical demands of the truck. This is especially true for models with the diesel engine, which have a dual-battery setup. It's important to use a high-quality AGM battery and to keep the terminals clean to ensure a long service life.
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More specs for the 2023 Ram 2500
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2023 Ram 2500 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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Values can vary by engine, trim and build date; check your VIN-specific service information. Updated 2026-08-15.