Introduction
Thank you for choosing the Energizer PRO-400 Rechargeable Headlamp. This manual provides essential information for the safe and effective use of your new headlamp. Please read it thoroughly before operation and retain it for future reference.
Safety Information
- Eye Safety: Do not shine the light directly into eyes. The high intensity light can cause temporary vision impairment.
- Children: Keep out of reach of children. This product is not a toy.
- Battery Care: Use only the provided USB cable for charging. Do not attempt to open or replace the integrated Lithium Ion battery.
- Heat: The headlamp may become warm during prolonged use. This is normal.
- Water Resistance: The headlamp is IPX4 water resistant, meaning it is protected against splashing water from any direction. It is not designed for submersion.
Package Contents
Your Energizer PRO-400 Rechargeable Headlamp package includes:
- Two (2) Energizer PRO-400 Headlamps
- Two (2) Adjustable Headstraps
- Two (2) USB Charging Cables

Image: Contents of the Energizer PRO-400 Headlamp 2-pack, showing two headlamps, adjustable headstraps, and USB charging cables.
Product Overview
The Energizer PRO-400 Headlamp is designed for versatile, hands-free lighting. Key features include:
- Powerful Illumination: Provides up to 400 lumens of bright LED light, 15 times brighter than standard LED technology.
- Rechargeable: Integrated Lithium Ion battery, rechargeable via USB.
- Multiple Light Modes: Offers 7 light modes, including high, low, wide beam, red, flashing red, and green for various conditions.
- Smart Dimming Technology: Allows control over light intensity.
- Durable & Water Resistant: Impact resistant up to 1 meter and IPX4 water resistant.
- Pivoting Head: Adjust the beam angle to direct light where needed.
- Low Battery Indicator: Alerts you when the battery is running low.

Image: The Energizer PRO-400 headlamp provides 400 lumens of bright light, making it ideal for detailed tasks in low-light conditions.

Image: Easily switch between 7 light modes, including high, low, wide beam, red, flashing red, and green, to suit various activities and environments.

Image: Experience an impressive 80-meter beam distance, spanning over half a stadium field, for clear visibility during outdoor adventures.

Image: Built with durable construction, the headlamp features a pivoting head, impact resistance up to 1 meter, a low battery indicator, and IPX4 weather resistance for reliable performance.
Setup
1. Charging the Headlamp
Before first use, fully charge your headlamp. The integrated Lithium Ion battery provides convenient rechargeable power.
- Locate the USB charging port on the headlamp.
- Connect the provided USB charging cable to the headlamp and a compatible USB power source (e.g., computer, wall adapter).
- A red indicator light will illuminate during charging. The light will change or turn off when fully charged (approximately 4 hours).

Image: The headlamp is rechargeable via USB, fully charging in approximately 4 hours, and includes a USB cable.
2. Adjusting the Headstrap
The comfortable headstrap is adjustable to fit various head sizes and can be worn over hats or helmets.
- Place the headlamp on your head with the light unit positioned at the front.
- Use the adjustable buckles on the strap to tighten or loosen it until it feels secure and comfortable.
Operating Instructions
The Energizer PRO-400 Headlamp features intuitive controls for easy mode selection.
1. Power On/Off and Mode Selection
The headlamp has two buttons: one for white light modes and another for red/green light modes.
- White Light Modes: Press the power button (usually on the left side) to cycle through white light modes: High, Low, Wide. Press and hold to activate Smart Dimming.
- Red/Green Light Modes: Press the secondary button (usually on the right side) to cycle through red, flashing red, and green light modes.
- Power Off: To turn off the headlamp from any mode, press and hold the active mode button until the light extinguishes.
2. Pivoting Head
The headlamp unit can be tilted up or down to adjust the beam angle, allowing you to direct light precisely where it's needed without moving your head.
Video: This video demonstrates the various light modes and the adjustable headstrap of the Energizer LED Headlamp.
Maintenance
Cleaning
- Wipe the headlamp body with a soft, damp cloth.
- Do not use abrasive cleaners or solvents.
- Clean the lens gently with a microfiber cloth to avoid scratches.
Storage
- Store the headlamp in a cool, dry place away from direct sunlight.
- Ensure the headlamp is fully charged before long-term storage to maintain battery health.
Battery Care
- Recharge the headlamp regularly, even if not in frequent use, to prolong battery life.
- Avoid completely draining the battery before recharging.
Troubleshooting
- Light not turning on: Ensure the battery is charged. Connect to a USB power source and check the charging indicator.
- Light flickering or dim: The battery may be low. Recharge the headlamp.
- Headlamp not charging: Check the USB cable connection and try a different USB power source. Ensure the charging port is clean and free of debris.
- Strap too loose/tight: Adjust the buckles on the headstrap for a comfortable fit.
Specifications
| Feature | Specification |
|---|---|
| Model Number | ENHDFRLP2A |
| Light Source Type | LED |
| Brightness | 400 Lumens (White) |
| Beam Distance | 80 meters |
| Power Source | Rechargeable Lithium Ion Battery |
| Charging Time | Approx. 4 hours |
| Water Resistance | IPX4 (Splash Resistant) |
| Impact Resistance | Up to 1 meter |
| Material | Plastic |
| Color | Forest Green |
| Product Dimensions | 2.36"D x 3.74"W x 2.95"H |
Warranty and Support
Energizer products are manufactured to high quality standards. For warranty information or technical support, please visit the official Energizer Support Website or contact their customer service directly. Please retain your proof of purchase for any warranty claims.



