Energizer 43666
Energizer 4-in-1 LED Power Failure Night Light Instruction Manual
Brand: Energizer | Model: 43666
1. Introduction
The Energizer 4-in-1 LED Power Failure Night Light is a versatile lighting solution designed to provide illumination in various situations. This innovative device functions as a light-sensing night light, a power failure light, a tabletop light, and an emergency flashlight. Its integrated rechargeable battery ensures readiness for unexpected power outages, offering peace of mind and reliable light when you need it most.
2. Key Features
- 4 Uses, 1 Product: Functions as a night light, power failure light, tabletop light, and emergency flashlight.
- Light Sensing: Automatically turns on at dusk and off at dawn, conserving energy.
- LED Technology: Long-lasting and energy-efficient illumination with no bulbs to replace.
- Rechargeable Battery: Internal battery charges while plugged into an outlet, providing power during outages.
- Versatility: Ideal for various indoor spaces including bedrooms, bathrooms, hallways, and stairs.
3. Setup and Installation
To set up your Energizer 4-in-1 LED Power Failure Night Light, simply plug it into any standard 120V AC wall outlet. Ensure the prongs are fully inserted. The unit will begin charging its internal battery immediately.

The Energizer 4-in-1 Night Light is designed for simple plug-and-play setup. Insert the foldable prongs into any standard wall outlet. The light features a light sensor that automatically turns the night light function off when the room is lit.

When plugged in, the internal rechargeable battery continuously charges, ensuring the unit is always ready for power outages. The night light provides a soft, ambient glow in low-light conditions.
Initial Charge
For optimal performance, it is recommended to fully charge the unit overnight (approximately 12-16 hours) before its first use. This ensures the internal rechargeable battery is at full capacity for emergency situations.
Product Demonstration Video
Official product video demonstrating the features and functionality of the Energizer 4-in-1 Power Failure Night Light, including its light-sensing and emergency light capabilities.
4. Operating Modes
The Energizer 4-in-1 Night Light offers multiple modes to suit your lighting needs:
Night Light Mode
When plugged into an outlet, the unit functions as a light-sensing night light. It automatically turns on when the ambient light is low and turns off when the room is sufficiently lit. Press the power button on the side to cycle through brightness settings (Low: 5 Lumens, High: 15 Lumens) or to turn the night light off.
Emergency Light Mode
In the event of a power failure, the unit will automatically illuminate at 5 Lumens, providing immediate light. This feature relies on the internal rechargeable battery, which is continuously charged while the unit is plugged into a live outlet.
Tabletop Light Mode
For general area illumination, the unit can be placed on a flat surface. In this mode, it provides 20 Lumens of light, ideal for reading or working in low-light conditions.
Emergency Flashlight Mode
The unit can be easily removed from the wall outlet and used as a portable flashlight. Simply fold the prongs into the unit for comfortable handheld use. In flashlight mode, it provides 40 Lumens of focused light, perfect for navigating dark spaces or during power outages.

The unit can be removed from the wall and used as a portable flashlight. Simply fold the prongs for comfortable handheld use. This mode is ideal for navigating during power outages or for general illumination.

Its versatile design makes it suitable for various locations such as bedrooms, bathrooms, hallways, and kitchens, providing illumination where needed.

The compact and portable design allows for easy storage and transport, making it convenient for travel or on-the-go lighting needs.

The Energizer 4-in-1 Night Light offers multiple lighting modes: a light-sensing night light (5-15 Lumens), an emergency light (5 Lumens) that activates during power failures, a tabletop light (20 Lumens) for general area illumination, and a handheld flashlight (40 Lumens.

The integrated rechargeable battery ensures seamless transition to emergency lighting during power outages. The unit automatically switches to battery power when the main power supply is interrupted.
5. Maintenance
The Energizer 4-in-1 LED Power Failure Night Light requires minimal maintenance.
- Cleaning: Wipe the unit with a dry, soft cloth. Do not use abrasive cleaners or immerse the unit in water.
- Battery: The internal rechargeable battery is non-replaceable. Ensure the unit remains plugged into an outlet when not in use to keep the battery charged.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Night light does not turn on in the dark. | Unit not fully charged or sensor is obstructed. | Ensure unit is plugged in and charged overnight. Check that the light sensor (located on the bottom) is not covered. |
| Emergency light does not activate during power outage. | Battery is not charged. | Keep the unit plugged into a live outlet at all times to maintain battery charge. Test by unplugging the unit from the wall. |
| Light flashes constantly. | Battery degradation or internal fault. | This may indicate the end of the product's lifespan or a battery issue. If within warranty, contact customer support. |
| Light does not turn off in bright conditions. | Light sensor is obstructed or faulty. | Ensure the light sensor is clean and unobstructed. If the issue persists, the sensor may be faulty. |
7. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 2.85"D x 6.2"W x 5.2"H |
| Item Weight | 1.65 pounds |
| Light Source Type | LED |
| Brightness | 40 Lumens (Flashlight), 5-15 Lumens (Night Light), 20 Lumens (Tabletop Light) |
| Power Source | Plug-In (Rechargeable Battery) |
| Voltage | 120 Volts |
| Wattage | 1 watts |
| Material | Plastic |
| Indoor/Outdoor Usage | Indoor |
| Manufacturer | Jasco Products Company, LLC |
| Model Number | 43666 |
8. Warranty and Support
The Energizer 4-in-1 LED Power Failure Night Light comes with a 90-day limited warranty. For warranty claims or technical support, please refer to the contact information provided in the official user manual.
An electronic version of the user manual can be accessed via the following link: Energizer 4-in-1 Night Light User Manual (PDF)
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