Introduction
This manual provides essential information for the safe and effective use of your Leoch DJW12-9 12V 9Ah Sealed Lead Acid (SLA) replacement battery. This battery utilizes Absorbed Glass Mat (AGM) technology, making it a Valve Regulated Lead Acid (VRLA) type, designed for various applications including Uninterruptible Power Supply (UPS) systems. Please read this manual thoroughly before installation and operation.

An image showing the Leoch DJW12-9 12V 9Ah Sealed Lead Acid battery. The battery is rectangular, typically black or gray, with two F2 terminals on top for connection.
Safety Information
Always observe the following safety precautions when handling and installing lead-acid batteries:
- Eye Protection: Wear appropriate eye protection (safety glasses or goggles) to prevent contact with battery acid.
- Skin Protection: Wear gloves and protective clothing to avoid skin contact with battery acid.
- Ventilation: Ensure adequate ventilation when charging or operating batteries to prevent the accumulation of explosive gases.
- Short Circuits: Avoid short-circuiting the battery terminals. Do not place tools or metallic objects on top of the battery.
- Fire Hazards: Keep sparks, flames, and smoking materials away from batteries.
- Handling: Lift batteries carefully. Heavy batteries may require assistance or lifting equipment.
- Disposal: Dispose of spent batteries according to local regulations. Do not incinerate.
Setup and Installation
Follow these steps for proper installation of your replacement battery:
- Preparation: Ensure the device or system where the battery will be installed is powered off and disconnected from any power source.
- Old Battery Removal: Carefully disconnect the negative (-) terminal first, then the positive (+) terminal from the old battery. Remove the old battery.
- New Battery Placement: Place the new Leoch DJW12-9 battery in the designated compartment, ensuring it is stable and secure.
- Terminal Connection: Connect the positive (+) cable to the positive (+) terminal of the new battery first. Then, connect the negative (-) cable to the negative (-) terminal. Ensure connections are tight and secure to prevent arcing or poor performance. The battery features F2 terminals.
- Verification: Double-check all connections for correct polarity and tightness.
Operating Instructions
The Leoch DJW12-9 is a maintenance-free sealed lead-acid battery designed for reliable power delivery. Once properly installed, it operates automatically within its intended system (e.g., UPS, emergency lighting, security systems).
- Initial Charge: While batteries are typically shipped with a partial charge, it is recommended to fully charge the battery before its first use, especially if it has been stored for an extended period. Refer to your device's manual for charging instructions.
- Charging: Use a charger specifically designed for 12V sealed lead-acid batteries. Overcharging or undercharging can reduce battery life.
- Discharge: Avoid deep discharge whenever possible, as this can shorten the battery's lifespan.
- Temperature: Operate the battery within its specified temperature range (typically 20°C to 25°C or 68°F to 77°F for optimal performance and lifespan).
Maintenance
The Leoch DJW12-9 is a maintenance-free battery, meaning it does not require water additions. However, some general care practices will help prolong its life:
- Keep Clean: Periodically wipe the battery casing and terminals with a clean, damp cloth to remove dust and dirt. Ensure terminals are free of corrosion.
- Terminal Check: Ensure terminal connections remain tight. Loose connections can cause resistance, heat, and reduced performance.
- Storage: If storing the battery for an extended period, ensure it is fully charged and stored in a cool, dry place. Recharge every 3-6 months to prevent sulfation and maintain capacity.
- Avoid Physical Damage: Protect the battery from impacts or punctures.
Troubleshooting
If you encounter issues with your battery, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not holding charge | Improper charging, charger malfunction, battery age, excessive discharge. | Verify charger output. Ensure full charge cycles. If battery is old, replacement may be necessary. Avoid deep discharges. |
| Device not powering on | Loose connections, battery not charged, device malfunction, blown fuse. | Check all terminal connections for tightness. Ensure battery is fully charged. Inspect device's fuse. Consult device manual. |
| Battery appears swollen or leaking | Overcharging, internal damage, excessive heat. | Immediately disconnect the battery. Do not attempt to use or charge. Dispose of safely according to local regulations. This indicates a severe fault. |
Specifications
Key technical specifications for the Leoch DJW12-9 battery:
| Feature | Specification |
|---|---|
| Model | DJW12-9 |
| Voltage | 12V (12 Volts) |
| Capacity | 9Ah (9 Amp Hours) |
| Terminal Type | F2 |
| Battery Cell Composition | Lead-Acid, AGM (Absorbed Glass Mat) |
| Battery Type | Sealed Lead Acid (SLA), Valve Regulated Lead Acid (VRLA) |
| Recommended Uses | UPS (Uninterruptible Power Supply), General Purpose |
| Unit Count | 1.00 Count |
Warranty and Support
This Leoch DJW12-9 replacement battery is typically covered by a limited warranty provided by the manufacturer or seller. The warranty period and terms may vary. Please retain your proof of purchase for warranty claims.
For technical support, warranty inquiries, or further assistance, please contact the seller or the UPS Battery Center customer service directly. Refer to your purchase documentation for contact information.





