In most Ram pickups, a standard 12-volt lead-acid automotive battery powers the starter motor and the vehicle’s electrical systems. On newer Ram models with the eTorque mild-hybrid system, there is also a 48-volt battery pack that supports hybrid functions. The exact battery type and size depend on the model year, engine and trim. Here is a detailed guide to what Ram owners should know when replacing or servicing the battery.
The standard 12‑volt battery: the backbone of Ram trucks
For everyday starting and electrical needs, the Ram uses a conventional 12‑volt battery. The most common group sizes you’ll encounter are:
- Group Size 65 — a widely used option for many Ram 1500 configurations; typical cold-cranking amps (CCA) around 700–800.
- Group Size 75 — a larger capacity option used on some trims or heavier-duty setups; commonly rated at about 750–850 CCA.
Note that the exact group size and CCA rating can vary by engine choice and model year. Always verify the label on the installed battery or consult the owner's manual or a dealer to confirm the correct specification for your truck.
The 48‑volt eTorque system: a companion, not a replacement flagship
Ram’s 48‑volt mild-hybrid eTorque system uses a separate high‑voltage battery pack to support start‑stop and torque‑assist functions. This is in addition to the standard 12‑volt battery used for routine starting and general electrical loads. The presence and specifics of the 48V pack vary by model year and powertrain.
- Purpose: provides electrical support to improve efficiency and smoothness during start‑stop and acceleration.
- Location and accessibility: the 48V pack is integrated with the drivetrain system and is not typically serviced by owners as a routine replacement.
- Compatibility: Ram vehicles without eTorque rely solely on the 12‑volt battery for starting and traditional electrical duties.
Owners should not attempt to upgrade or replace the 48V pack themselves; service and replacement should be handled by a dealer or qualified technician.
How to identify the right battery for your Ram
When replacing a Ram battery, use these steps to ensure you select the correct part for your vehicle.
- Check the owner's manual or Ram's official specifications for the recommended battery group size and CCA for your exact year and engine.
- Inspect the label on the current battery for the group size (such as 65 or 75) and the cold-cranking amps (CCA).
- If you’re unsure, use your vehicle’s VIN in a parts retailer’s lookup tool to confirm OEM-equivalent battery selection.
- Confirm terminal layout and compatibility with your truck’s positive/negative post configuration and mounting arrangement.
- Consider climate and usage: in cold climates, higher CCA or a higher-capacity battery may be beneficial.
With the right information, replacing a Ram battery is straightforward, either as a DIY project with proper precautions or through a professional service.
Summary
Most Dodge Ram pickups rely on a 12‑volt lead-acid battery for everyday operation, with common group sizes around 65 or 75 depending on model and engine. Some variants equipped with the eTorque mild-hybrid system include a separate 48‑volt battery pack supporting the hybrid functions. Always verify the exact specification for your vehicle using the manual, a label on the battery, or VIN lookup, and consider climate when choosing a replacement. If in doubt, consult a dealer or trusted repair shop to ensure compatibility and proper installation.
What is the best battery for a RAM truck?
Some of our most popular batteries for Ram vehicles are the Duracell Ultra Platinum AGM Group 94R Battery, the Duracell Ultra Gold Flooded Group 48 Battery and the Duracell Ultra Gold Flooded Group 94R Battery.
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What size battery is in the Ram 1500 5.7 Hemi?
DieHard Gold – Battery: H7 Group Size, 800 CCA, 1000 CA, 140 Minute Reserve Capacity (Part No. 94RH7)
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What kind of battery is in a Dodge Ram?
EverStart Maxx Lead Acid Automotive Battery, Group Size H7 / LN4 / 94R 12 Volt, minimum 790 CCA.
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Which battery for Ram 1500?
Most newer RAM trucks will use either a DH7 or H8 battery.
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