1. Introduction
This manual provides essential information for the safe and effective use of your OPTIMA 34/78 RedTop Sealed AGM Starting Battery. The OPTIMA RedTop battery is engineered for high-power cranking ability, even in challenging weather conditions, making it suitable for various automotive applications including cars, trucks, and SUVs. Its unique SpiralCell design ensures a consistent and powerful energy source.

Image 1.1: OPTIMA 34/78 RedTop Battery, front view.
2. Safety Information
WARNING: Batteries contain sulfuric acid and produce explosive gases. Improper handling can cause severe injury or death.
- Always wear appropriate personal protective equipment, including safety glasses and gloves, when handling batteries.
- Ensure adequate ventilation when working with batteries to prevent the accumulation of explosive hydrogen gas.
- Keep sparks, flames, and smoking materials away from the battery.
- Avoid contact with battery acid. If contact occurs, flush immediately with water and seek medical attention.
- Do not short-circuit battery terminals.
- Keep batteries out of reach of children.
- Always disconnect the negative (black) terminal first and connect it last during installation or removal.
3. Product Features
The OPTIMA 34/78 RedTop battery incorporates advanced technology for reliable performance:
- SpiralCell Technology: Utilizes 99.99% pure lead in a unique spiral-wound cell design, delivering more power and outperforming conventional flat-plate batteries. This design also contributes to superior vibration resistance.
- High Cranking Amps: Provides 800 Cold Cranking Amps (CCA) for optimal starting power, even in cold weather conditions.
- Reserve Capacity: Offers a reserve capacity of 100 minutes, ensuring sustained performance.
- Maintenance-Free: The sealed AGM (Absorbed Glass Mat) design eliminates the need for water additions and prevents acid spills, offering maximum convenience.
- Vibration Resistance: Designed to be fifteen times more resistant to vibration compared to standard flooded batteries, enhancing durability.
- Longer Life: Engineered for up to three times longer life than standard flooded batteries.
- Faster Recharging: Capable of faster recharging, reducing downtime.
- Versatile Mounting: Completely non-spillable, allowing for mounting in various positions.

Image 3.1: Diagram illustrating OPTIMA's SpiralCell Technology with pure lead plates and absorbent glass-mat separators.

Image 3.2: Visual representation of key OPTIMA battery benefits.
4. Specifications
| Specification | Value |
|---|---|
| Voltage | 12-Volt |
| Cold Cranking Amps (CCA) | 800 CCA |
| C20 Capacity | 50 AH |
| Reserve Capacity | 100 minutes |
| Dimensions (L x W x H) | 10.06" x 6.94" x 7.88" (254mm x 175mm x 200mm) |
| Weight | 38.8 pounds |
| Terminal Type | Dual SAE & GM Posts |
| Number of Cells | 6 |
| Model Number | 34/78 (OEM Part Number: 8004-003) |

Image 4.1: Front view of the OPTIMA 34/78 RedTop Battery, showing terminal configuration.
5. Setup and Installation
Proper installation is crucial for battery performance and safety. If you are unsure about any step, consult a qualified automotive technician.
5.1 Pre-Installation Checks
- Verify that the OPTIMA 34/78 RedTop battery is the correct size and type for your vehicle.
- Inspect the battery for any signs of damage. Do not install a damaged battery.
- Ensure your vehicle's ignition is off and all accessories are disconnected.
5.2 Removal of Old Battery
- Locate the vehicle's battery.
- Using an appropriate wrench, disconnect the negative (black, -) terminal cable first. Store it away from the battery.
- Next, disconnect the positive (red, +) terminal cable.
- Remove any battery hold-down clamps or straps.
- Carefully lift and remove the old battery. Batteries are heavy; use proper lifting techniques or assistance.
5.3 Installation of New Battery
- Clean the battery tray and terminal clamps to ensure good electrical contact.
- Place the OPTIMA 34/78 RedTop battery into the battery tray, ensuring it is seated securely.
- Secure the battery with hold-down clamps or straps.
- Connect the positive (red, +) terminal cable first. Tighten securely.
- Connect the negative (black, -) terminal cable last. Tighten securely.
- Apply a thin layer of anti-corrosion grease to the terminals to prevent corrosion.

Image 5.1: Side view of the OPTIMA 34/78 RedTop Battery, showing its compact design.
6. Operating Instructions
The OPTIMA 34/78 RedTop battery is designed for starting applications, providing a powerful burst of energy to start your engine. Once installed, it operates as a standard automotive starting battery.
- Ensure all electrical connections are tight and free of corrosion for optimal performance.
- The battery's 800 CCA rating ensures reliable starting even in low temperatures.
- The 100-minute reserve capacity provides a safety margin for vehicle electrical systems.

Image 6.1: OPTIMA RedTop Battery in a typical usage environment.
7. Maintenance
The OPTIMA RedTop battery is a sealed, maintenance-free AGM battery, meaning it does not require water additions or electrolyte level checks.
- Terminal Cleaning: Periodically inspect battery terminals for corrosion. If corrosion is present, disconnect the battery (negative first, then positive) and clean the terminals and cable clamps with a wire brush and a baking soda/water solution. Rinse with clean water and dry thoroughly before reconnecting.
- Terminal Security: Ensure battery cables are always securely fastened to the terminals. Loose connections can lead to poor performance and potential damage.
- Battery Top: Keep the top of the battery clean and dry to prevent current leakage.
- Charging: If the vehicle is stored for extended periods or experiences frequent short trips, occasional charging with a compatible AGM battery charger is recommended to maintain optimal charge and extend battery life. Avoid overcharging.
8. Troubleshooting
If you experience issues with your OPTIMA 34/78 RedTop battery, consider the following:
8.1 Engine Cranks Slowly or Not at All
- Check Connections: Ensure battery terminals and cable clamps are clean and tightly secured. Loose or corroded connections can impede current flow.
- Battery Charge: The battery may be discharged. Use a voltmeter to check the battery voltage. A fully charged 12V battery should read approximately 12.6V or higher. If low, charge the battery using an appropriate AGM charger.
- Alternator/Charging System: If the battery repeatedly discharges, have your vehicle's charging system (alternator, voltage regulator) inspected by a professional.
8.2 Lights Dim or Electrical Accessories Malfunction
- This often indicates a low battery charge. Follow the steps for checking battery charge and charging as described above.
- Inspect for any parasitic drains on the electrical system that might be discharging the battery when the vehicle is off.
For persistent issues, consult a professional automotive technician or OPTIMA customer support.
9. Warranty and Support
For detailed warranty information regarding your OPTIMA 34/78 RedTop battery, please refer to the official warranty documentation provided with your purchase or visit the official OPTIMA website. Warranty terms and conditions may vary.
For technical assistance, product inquiries, or support, please contact OPTIMA customer service through their official channels. You can find more information and contact details on the OPTIMA Brand Store.





