1. Introduction
This manual provides essential information for the safe and effective use of your Interstate Batteries MTX-49/H8 AGM Automotive Battery. Please read all instructions carefully before installation and operation to ensure optimal performance and safety.
The Interstate Batteries MTX-49/H8 is a 12V 95Ah (Group Size H8, 49) 900CCA SLI AGM Automobile Replacement Battery designed for cars, SUVs, sedans, and trucks. It features advanced Absorbed Glass-Mat (AGM) technology for enhanced performance and durability.
2. Safety Information
DANGER / POISON
- EXPLOSIVE GASES: Batteries produce explosive gases. Keep sparks, flames, and cigarettes away from the battery. Ensure adequate ventilation when charging or operating in an enclosed space.
- SULFURIC ACID: Contains sulfuric acid, which can cause blindness or severe burns. Avoid contact with skin, eyes, or clothing. In case of contact, flush eyes immediately with water for at least 15 minutes and seek medical help.
- SHIELD EYES: Always wear eye protection when working with batteries.
- KEEP OUT OF THE REACH OF CHILDREN: Batteries contain hazardous materials.
- DO NOT OPEN BATTERY: This is a sealed, maintenance-free battery. Opening it can release hazardous substances and void the warranty.
- RECYCLE: Do not dispose of the battery in household waste. Always recycle used batteries at an authorized recycling center.
- READ INSTRUCTIONS: Always refer to the product manual for complete safety and operating instructions.
Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Image: Top view of the Interstate Batteries MTX-49/H8 battery, highlighting safety warnings and product labels.
3. Product Features
- AUTOMOTIVE PURE LEAD AGM: Designed with pure lead AGM technology, packing more lead into the battery for extended life, especially for start-stop vehicles.
- PREMIUM BATTERY PERFORMANCE: Meets or exceeds starting requirements and delivers premium performance for vehicle accessories and plug-ins.
- EXTENDED BATTERY LIFE: Offers 2-3 times longer service life compared to conventional lead alloy AGM and flooded batteries. Spill-proof and vibration resistant design.
- MAINTENANCE-FREE AND SPILL-PROOF: Rechargeable, maintenance-free, and spill-proof due to AGM and VRLA (valve regulated) technology. Electrolyte is suspended in fiberglass mats, eliminating free-flowing liquid.
- TRUSTWORTHY POWER SOURCE: Backed by over 70 years of experience from Interstate Batteries, a preferred choice among automotive professionals.

Image: Cross-section diagram of an AGM battery, showing the internal components and sealed design.
4. Specifications
| Attribute | Value |
|---|---|
| Brand | Interstate Batteries |
| Model | MTX-49/H8 |
| Voltage | 12 Volts |
| Capacity | 95Ah |
| Cold Cranking Amps (CCA) | 900CCA |
| Group Size | H8, 49 |
| Battery Cell Composition | Lead-Acid, AGM |
| Item Weight | 59 pounds |
| Product Dimensions | 13.94"W x 6.94"D x 7.5"H |
| Terminal Type | Top Post |
| Special Features | Rechargeable, Maintenance-Free, Spill-Proof, Vibration Resistant |

Image: Front view of the MTX-49/H8 battery displaying key electrical specifications.

Image: Side view of the MTX-49/H8 battery with detailed dimensions.
5. Setup and Installation
Proper installation is crucial for the performance and longevity of your battery. Always refer to your vehicle's owner's manual for specific instructions and safety precautions.
General Installation Steps:
- Safety First: Ensure the vehicle is turned off and the parking brake is engaged. Wear appropriate personal protective equipment, including safety glasses and gloves.
- Locate Battery: Identify the location of your vehicle's battery.
- Disconnect Old Battery: Always disconnect the negative (-) terminal first, followed by the positive (+) terminal. Remove any hold-down clamps or straps.
- Remove Old Battery: Carefully lift the old battery out of the tray. Batteries are heavy; use proper lifting techniques or assistance.
- Clean Battery Tray: Clean the battery tray and terminal clamps to remove any corrosion or debris.
- Install New Battery: Place the Interstate Batteries MTX-49/H8 into the battery tray, ensuring it is seated securely.
- Secure Battery: Reinstall the hold-down clamps or straps to prevent movement.
- Connect New Battery: Connect the positive (+) terminal first, followed by the negative (-) terminal. Ensure connections are tight and secure.
- Apply Anti-Corrosion: Apply an anti-corrosion grease or spray to the terminals to prevent future corrosion.
- Final Check: Double-check all connections and ensure no tools are left in the engine bay.
Installation Video Example (General AGM Battery):
Video: General installation guide for an AGM battery (Group 48 shown, process is similar for Group 49/H8). Courtesy of Uplus Battery US.
Video: Specific installation steps for an H8 battery. Courtesy of Mighty Max Battery.
Video: Installation process for a BCI Group 47/48/49/94r AGM Car Battery, which includes Group Size 49. Courtesy of Autocessking.
6. Operating Instructions
Your Interstate Batteries MTX-49/H8 AGM battery is designed for reliable starting power and to support your vehicle's electrical systems. Once properly installed, it operates automatically with your vehicle.
- Vehicle Start-Stop Systems: This AGM battery is optimized for vehicles equipped with start-stop technology, providing consistent power for frequent engine restarts.
- Accessory Power: Provides stable power for all your vehicle's accessories and plug-ins, ensuring optimal performance.
- Cold Weather Performance: The 900CCA rating ensures strong starting power even in cold weather conditions.
Understanding AGM Batteries:
Video: Explanation of what an AGM battery is and its benefits. Courtesy of Interstate Batteries.
Video: Why modern vehicles benefit from AGM batteries. Courtesy of Interstate Batteries.
7. Maintenance
The Interstate Batteries MTX-49/H8 is a maintenance-free battery, meaning it does not require regular watering or electrolyte level checks. However, general care can extend its life and ensure optimal performance:
- Keep Clean: Periodically inspect the battery and terminals for dirt, debris, or corrosion. Clean with a battery terminal brush and a solution of baking soda and water if necessary. Rinse with clean water and dry thoroughly.
- Check Connections: Ensure terminal connections remain tight and secure. Loose connections can lead to poor performance and potential damage.
- Avoid Deep Discharge: While AGM batteries are more tolerant to deep discharges than flooded batteries, repeated deep discharges can shorten their lifespan. If your vehicle is stored for extended periods, consider using a trickle charger or battery maintainer designed for AGM batteries.
- Temperature Management: Extreme temperatures can affect battery life. Ensure the battery is properly secured in its tray to minimize vibration, which can generate heat.
8. Troubleshooting
If you experience issues with your battery, consider the following common problems and solutions:
- Slow Cranking or No Start:
- Check battery terminals for corrosion and tightness.
- Ensure the battery is fully charged. Use a battery charger if necessary.
- Have the battery tested by a professional to check its state of health and charge.
- Lights Dim or Accessories Malfunctioning:
- This could indicate a low battery charge or a problem with the vehicle's charging system (alternator).
- Test the battery voltage with a multimeter. A fully charged 12V battery should read around 12.6V to 12.8V.
- Battery Leaking:
- AGM batteries are spill-proof. If you observe any leakage, it may indicate severe damage or improper installation. Disconnect the battery immediately and seek professional assistance.
Battery Testing:
Video: Overview of battery testing procedures. Courtesy of Interstate Batteries.
9. Warranty and Support
Your Interstate Batteries MTX-49/H8 AGM battery comes with a 36-month free replacement warranty. For warranty claims or technical support, please refer to the official Interstate Batteries website or contact their customer service.
For more information and to verify fit, you can download the Compatibility Guide under Product Guides & Documents on the product's Amazon page or visit the official Interstate Batteries website: www.interstatebatteries.com
You can also scan the QR code on the battery for warranty information: QR Code Link
10. Battery Disposal
Automotive batteries contain lead and sulfuric acid, which are hazardous materials. Proper disposal is essential for environmental protection.
- Recycle: Always recycle your used battery. Most automotive parts stores and recycling centers accept old batteries for recycling.
- Do Not Incinerate: Never incinerate batteries, as they can explode.
- Avoid Landfills: Do not dispose of batteries in regular trash or landfills.





