WSD-EMPK04E27-4W LED Emergency Driver

Customer Reviews


4 Watt Compact Emergency Retrofit Ballast with Battery Back Up for LED Light Fixtures | Small Design 

WSD-EMPK04E27-4W LED Emergency Driver: Essential Power Backup for Lighting

Illuminate your space during power outages with the WSD-EMPK04E27-4W LED Emergency Driver. This driver ensures your LED fixtures remain on, providing safety and convenience in emergency situations. Its compact design and powerful features make it an ideal solution for a wide range of lighting applications.

Key Features and Benefits:

  • Universal Compatibility: Works with a broad input voltage range of 100-277 Vac, suitable for global use in diverse electrical environments.
  • Efficient Power Usage: Maximizes energy efficiency with a maximum AC input current of 100 mA and a power rating of 5.0 W.
  • Adjustable Output: Offers flexible output current and voltage settings from 30-400 mA and 10-60 Vdc, catering to various lighting needs.
  • Long-Lasting Battery: Equipped with a high-capacity 3.7 V / 2500 mAh Li-ion battery, ensuring sustained illumination during power interruptions.
  • Rapid Charging: Achieves full charge within 24 hours with a maximum charging current of 300 mA, ready for any emergency.
  • Optimal Operating Temperatures: Designed to function in ambient temperatures from 0°C to +50°C, ensuring reliability in various climates.
  • Easy Monitoring: Features an illuminated test switch and indicator light for straightforward testing and status checks.
  • Compact and Lightweight: With dimensions of 6.93 x 2.36 x 1.38 inches and weighing just 0.47 LBS, it's easy to install without adding bulk.


  • Output Power: 4 W
  • Input Voltage: 100-277 Vac, 50/60 Hz
  • Battery: Li-ion, 3.7 V / 2500 mAh
  • Temperature Rating: 0°C to +50°C
  • Warranty: Full 5-year warranty for peace of mind

Package Contents:

  • 1 x LED Emergency Driver with test switch
  • Packing Size: 6.93 x 2.36 x 1.38 inches
  • Weight: 0.47 LBS

Ensure your lighting remains uninterrupted during power failures with the WSD-EMPK04E27-4W LED Emergency Driver. With its powerful features, universal compatibility, and full 5-year warranty, it offers both security and durability for all your lighting needs.




*This product typically ships in 2 to 3 business days. Larger quantities may take longer than stated lead-time. All lead-times are estimates and you will be notified by email if it will take longer than 5 business days to ship. This item ships directly from the factory. Warehouses located in NC, TX and CA.

** . All prices shown are per item.

Extra Information

Catalog No:
Order Code:
Fixture Type:
Emergency Driver
Emergency Operation:
90 Minutes
Emergency Wattage:
Fixture Environment:
Input Voltage:
Light Source:
Output Power:
4W Max
50/60 Hz
Input Current:
100mA Max
Charging Time:
24 Hours Minimum
Battery Life:
500 cycles
5 years
Price Shown:
Per Driver