What Size Battery Fits My RAM Truck?

Battery fitments for the RAM & Dodge Ram trucks can be confusing, as evidenced by this sentence, which appears to be redundant. One of the most-confusing aspects of finding the right battery for your RAM truck is whether or not it has "Dodge" in front of it. Up until the 2010 model year, all RAM trucks had the "Dodge" name in front of them. After that, they are simply referred to as "RAM" trucks...at least in battery fitmet guides. 

Now that we've established that, let's dive into the actual fitments, which can also be confusing. You can cut through some of that confusion and just enter the year/make/model/engine in our search tool at the top of this page. Most newer RAM trucks will use either a DH7 or H8 battery. Unfortunately, battery sizes often have more than one reference number. The Group 94R battery size in the chart below is the same as a DH7 and the Group 49 battery size is the same as an H8 battery.

OPTIMA offers a direct-fit DH7 YELLOWTOP for 94R applications, weighing in at 60.5 pound and rated at 880 CCA and 80Ah. Our friends at Weistec also offer an adapter that will allow you to use our DH6 YELLOWTOP (54 lbs/800CCA/72Ah) in H8/Group 49 applications. The “69” designation in the second column indicates an AGM battery is required. Fortunately, all OPTIMA batteries are AGM batteries.

Older Dodge Ram trucks typically use one of three different batteries- the 94R(DH7), the Group 65 (which we also fit with our Group 34 batteries) and the Group 27 battery, depending on the year, the model and the engine. Where the newer RAM trucks would use our YELLOWTOP batteries exclusively, older Ram trucks that use Group 65 batteries can choose between our REDTOP and YELLOWTOP batteries.

If your truck is stock from an electrical perspective, a Group 34 REDTOP offers great cranking power for starting your engine. However, if your truck has a car alarm, winch, aftermarket car audio, auxiliary lights or other significant electrical accessories, then a Group 34 YELLOWTOP is a better option (OPTIMA Group 27 batteries only come in YELLOWTOPs).

In the older Ram 2500 and 3500 trucks equipped with diesel engines, two batteries are typically used. Whenever any application uses two or more batteries in series or parallel, those batteries need to be identical in age, size and type. Using mis-matched batteries in any of those ways can compromise the performance & lifespan of both batteries. That doesn't mean you need to recycle both batteries if one goes bad, but you should replace both batteries and move the remaining good battery to another application.


You should make sure to properly-maintain the voltage in whatever battery or batteries you choose. Our REDTOPs are fully-charged at about 12.6-12.8V and our YELLOWTOPs are fully-charged at about 13.0-13.2 volts. Whenever any battery is discharged below 12.4 and is left sitting in that state, sulfation starts forming in the plates, which diminishes both capacity and lifespan. That makes a quality battery charger a great investment for any vehicle owner.

We're so confident proper voltage maintenance will increase the lifespan of your battery, we'll add a full year of free replacement warranty coverage to your OPTIMA battery, if you purchase it from us at the same time as an OPTIMA Digital 1200 battery charger.