ACDelco 94R AGM Battery
We engineered the ACDelco 94R AGM battery to deliver uncompromising performance for modern vehicles with demanding electrical systems. This absorbed glass mat design provides superior starting power in extreme temperatures while supporting high-draw electronics like navigation systems, heated seats, and advanced driver assistance features.
Our 94R measures 12.4 x 6.9 x 7.5 inches and fits a wide range of domestic and import vehicles requiring Group 94R fitment. The sealed, spill-proof construction eliminates maintenance while the valve-regulated design safely vents gases under pressure. Whether you’re driving daily or storing your vehicle seasonally, this battery resists sulfation and maintains charge better than conventional flooded batteries.
- 800 cold cranking amps (CCA) for reliable starts in sub-zero temperatures
- AGM absorbed glass mat technology prevents acid leakage and vibration damage
- Group 94R fitment: 12.4 x 6.9 x 7.5 inches, top-post terminals
- Valve-regulated design with built-in flame arrestor for safe operation
- Enhanced cycling capability handles repeated charge/discharge better than standard batteries
AGM Technology & Construction
The ACDelco 94R AGM battery uses absorbed glass mat technology that suspends electrolyte within fiberglass mat separators between the lead plates. This design prevents the acid from sloshing, making our battery completely spill-proof even if the case cracks during an accident.
Unlike conventional flooded batteries, AGM construction delivers three times the cycle life and significantly faster recharge rates. The tightly compressed plates and mats reduce internal resistance, allowing the 94R to deliver high burst currents for cold-weather starting while recovering quickly from deep discharges. Our valve-regulated design maintains optimal internal pressure while safely venting excess gases through a flame-arresting cap.
Fitment & Vehicle Compatibility
Group 94R Specifications
The 94R designation indicates specific dimensional and terminal configuration standards. Our battery measures 12.4 inches long, 6.9 inches wide, and 7.5 inches tall with top-post terminals positioned for reverse polarity compared to Group 94 (note the “R” suffix).
This size commonly fits 2010-newer BMW 3-Series and 5-Series, select Mercedes-Benz models, Audi A4 and A6 vehicles, and various Volvo sedans. Always verify your current battery’s group size before ordering—the hold-down bracket and cable lengths must match. If you need broader AGM battery options for different vehicle applications, we manufacture Group 47, 48, 49, and other specialty sizes.
Cold Cranking Amps & Starting Performance
We rate the ACDelco 94R at 800 cold cranking amps, measured at 0°F for 30 seconds while maintaining at least 7.2 volts. This specification directly correlates to starting performance in winter conditions—higher CCA ratings mean more power available to turn the starter motor when oil thickens and engine drag increases.
Customers comparing acdelco 94r agm battery reviews frequently ask about CCA versus reserve capacity. While CCA measures short-burst starting power, our 120-minute reserve capacity rating indicates how long the battery can power essential electronics if the alternator fails. The AGM design excels at both metrics.
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What You Need to Know About the ACDelco 94R AGM Battery
The 94R fits vehicles requiring Group 94R dimensions (12.4 x 6.9 x 7.5 inches) with reverse terminal configuration. Common applications include 2010-newer BMW 3/5-Series, select Mercedes-Benz, Audi A4/A6, and Volvo models.
Always verify your current battery’s group size label before ordering. The “R” designation means positive terminal on the right—critical for proper cable reach. Check your owner’s manual or measure your existing battery and terminal positions to confirm 94R fitment.
Under normal conditions with proper charging practices, our 94R AGM battery typically lasts 4-7 years. Actual lifespan depends on climate, driving patterns, and electrical system health.
AGM batteries last significantly longer than flooded types when subjected to repeated discharge cycles from electronics or stop-start systems. Extreme heat shortens battery life more than cold—vehicles in Arizona may see 3-4 years while those in Minnesota often exceed 6 years. Using a smart maintainer during storage and avoiding deep discharges maximizes service life.
You can use standard chargers, but we strongly recommend selecting AGM-specific charging mode if available. AGM batteries require lower voltage (14.4-14.8V maximum) than flooded batteries to prevent damage to the glass mat separators.
Avoid “fast charge” or “engine start” modes that exceed 15 volts. If your charger lacks AGM settings, use the slowest charge rate and monitor battery temperature—it should never feel hot to touch. Smart chargers with AGM modes automatically adjust voltage and current for optimal charging without risk of overcharging.
Our 94R AGM uses absorbed glass mat technology that suspends electrolyte in fiberglass mats, making it spill-proof and maintenance-free. Flooded batteries have liquid acid that requires periodic water refills and can leak if tipped.
AGM provides three times the cycle life, faster recharging, and better performance in cold weather and high-drain applications. The sealed construction eliminates corrosive vapor and allows mounting in any position. AGM costs more upfront but lasts longer and performs better, especially in vehicles with stop-start systems or extensive electronics.
The ACDelco 94R provides 800 CCA, which exceeds requirements for most gasoline engines in Group 94R applications. Match or exceed your original battery’s CCA rating—never install significantly lower CCA than specified.
Colder climates and larger engines require higher CCA ratings. Diesel engines typically need 20-30% more CCA than equivalent gasoline engines. If you’ve added aftermarket electronics or a more powerful starter, consider higher CCA. The 94R’s 800 CCA handles most BMW, Audi, Mercedes, and Volvo applications with margin for aging and temperature loss.
We provide a 40-month limited warranty with free replacement during the first 18 months and prorated credit for months 19-40. Coverage includes manufacturing defects and premature capacity loss under normal use.
Warranty requires original purchase receipt and testing at an authorized service center. Exclusions include physical damage, improper installation, use beyond specifications, and neglect such as leaving the battery discharged for extended periods. Keep your receipt and follow proper charging practices to maintain full warranty protection.
For vehicles with stop-start systems, extensive electronics, or extreme climate exposure, AGM technology provides measurably better performance and longevity that justifies the higher initial cost compared to flooded batteries.
Many customers reading acdelco 94r agm battery reviews report 5-7 year service life versus 3-4 years for flooded batteries in the same vehicles. The maintenance-free operation, superior cold-weather cranking, and resistance to vibration damage deliver better total cost of ownership. If your vehicle originally came with AGM, we strongly recommend staying with AGM technology to support the electrical system’s design parameters.