Introduction
This manual provides essential instructions for the safe and effective use of your FITHOOD 12V Li-ion replacement battery, model CS-WRX125PW. This battery is designed to be compatible with various Worx power tools and replaces specific Worx battery part numbers.
Compatible Worx Tool Models:
- WU181, WU288, WU280, WX283.3, WX125.M, WU127, WX125.3 D-Lite, WU280.9, WU905, WX283
- H3 WX382, H3 WX382.4, WU924, H3 WX382.2, WX125.4, WX125.5, WX125.6, WX125.7, WX125.1, WX125.3
- WX128.2, WX128, WX125, H3 WX382.3, WX126, H3 WX382.5, H3 WX382.1, H3 WX382.7, H3 WX382.6, WX382.1
Compatible Worx Battery Part Numbers:
- WA3505, WA3503, WA3509
Please verify the compatibility with your specific tool model and existing battery part number before use.
Safety Information
Read and understand all safety warnings and instructions before using this battery. Failure to follow the warnings and instructions may result in electric shock, fire, and/or serious injury.

Image: The FITHOOD 12V Li-ion battery, showing its model number CS-WRX125PW, part number WA3503, rating 12.0VDC, 1500mAh, 18.0Wh, and important safety warnings printed on its label.
- Battery Replacement: Replace only with the battery pack designated for this product.
- Physical Damage: Do not crush, puncture, or dispose of in fire or water.
- Temperature: Do not store above 60°C (140°F).
- Short Circuits: Avoid short-circuiting the battery terminals.
- Charging: Use only chargers specifically designed for 12V Li-ion batteries. Using an incompatible charger may cause fire or explosion.
- Disposal: Dispose of used batteries according to local regulations. Do not dispose of in household waste.
- Children: Keep batteries out of reach of children.
Product Overview
The FITHOOD CS-WRX125PW is a high-quality Lithium-ion replacement battery designed to provide reliable power for your compatible Worx power tools.

Image: Side view of the FITHOOD 12V Li-ion battery, showing its textured grip and a QR code on the base.
Key Features:
- Capacity: 1500mAh / 18.00Wh
- Type: Li-ion (Lithium-ion)
- Voltage: 12.0V
- Dimensions: 80.92 x 47.60 x 46.30mm (3.19 x 1.87 x 1.82 inches)
Setup
Initial Charging
Before first use, it is recommended to fully charge the battery. Use a compatible Worx 12V Li-ion battery charger. Refer to your charger's instruction manual for specific charging procedures.
- Connect the charger to a power outlet.
- Slide the battery onto the charger until it clicks into place.
- Allow the battery to charge until the charger's indicator light signals a full charge.
- Once charged, remove the battery from the charger.
Battery Installation
To install the battery into your Worx power tool:
- Ensure the power tool is turned off and disconnected from any power source if applicable.
- Align the battery with the battery slot on your Worx power tool.
- Slide the battery firmly into the slot until it clicks securely into place. A secure click indicates proper installation.
Battery Removal
To remove the battery from your Worx power tool:
- Ensure the power tool is turned off.
- Locate the battery release button(s) on the tool.
- Press and hold the release button(s) while sliding the battery out of the tool.
Operating Instructions
This battery powers your compatible Worx tool. Always refer to your specific Worx power tool's instruction manual for detailed operating procedures.
- Ensure the battery is fully charged before beginning any task to maximize run time and performance.
- Insert the battery securely into the tool as described in the Setup section.
- Operate the power tool according to its manufacturer's guidelines.
- If the tool's performance decreases significantly, the battery may need recharging.
- Remove the battery from the tool when not in use for extended periods to prevent accidental activation and preserve battery life.
Maintenance
Storage
Proper storage helps extend the life of your battery.
- Store the battery in a cool, dry place, away from direct sunlight, moisture, and extreme temperatures (above 60°C / 140°F or below 0°C / 32°F).
- For long-term storage (more than 30 days), it is recommended to charge the battery to approximately 50% of its capacity.
- Avoid storing the battery in a completely discharged state.
Cleaning
Keep the battery and its terminals clean for optimal performance.
- Wipe the battery casing with a clean, dry, soft cloth.
- If the battery terminals become dirty, gently wipe them with a clean, dry cloth to ensure good electrical contact.
- Do not use water, solvents, or abrasive cleaners on the battery.
Troubleshooting
If you encounter issues with your FITHOOD battery, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging | Charger not connected; Battery too hot/cold; Faulty charger/battery | Ensure charger is plugged in; Allow battery to reach room temperature; Try a different charger (if available); Contact support if issue persists. |
| Battery not powering tool | Battery not fully inserted; Battery discharged; Faulty tool/battery | Re-insert battery firmly until it clicks; Charge the battery; Test battery in another compatible tool (if available); Contact support. |
| Reduced run time | Battery not fully charged; Battery aging; Operating in extreme temperatures | Ensure full charge; Battery capacity naturally decreases over time, consider replacement; Operate within recommended temperature ranges. |
Specifications
Detailed technical specifications for the FITHOOD CS-WRX125PW battery:
- Model Number: CS-WRX125PW
- Battery Type: Lithium Ion (Li-ion)
- Voltage: 12.0V
- Capacity: 1500mAh / 18.00Wh
- Product Dimensions (L x W x H): 80.92 x 47.60 x 46.30 mm (3.19 x 1.87 x 1.82 inches)
- Item Weight: Approximately 8.8 ounces
- Recommended Uses: Power Tool Battery Replacement
- Manufacturer: CS (for FITHOOD)
- Date First Available: March 2, 2019

Image: Top-down view of the FITHOOD 12V Li-ion battery, showcasing its overall shape and connection points.
Warranty and Support
FITHOOD stands behind the quality of its products.
- Warranty: We offer a one-month free replacement or full refund if any product problems arise.
- Customer Support: For any questions, concerns, or technical assistance regarding your FITHOOD battery, please contact the seller directly through your purchase platform. Provide your order details for faster service.





