Bigblue B401E Operation Manual

The Bigblue B401E is a professional-grade underwater video light designed for diving and underwater photography/videography. It features high-intensity LED illumination, multiple brightness modes, a rechargeable battery system, durable waterproof construction, intuitive controls, and safety features for marine environments. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: High-power LED array, Rechargeable battery pack, Control panel, Mounting bracket, Charging dock, O-ring seals.

Installation & Setup

Unpack and inspect all components. Ensure all parts are present and undamaged.

1. Charge the battery: Connect charging dock to power source, place light on dock until fully charged.
2. Install mounting bracket: Attach to camera housing or rig using 1/4"-20 screw.
3. Secure the light: Mount light onto bracket and tighten locking mechanism.
4. Check O-rings: Ensure all seals are clean, lubricated, and properly seated before underwater use.

WARNING! Do not use if O-rings are damaged or missing. Always test in shallow water first.

First-Time Use

Power on the light and familiarize yourself with controls before underwater deployment.

1. Power on: Press and hold power button for 2 seconds until indicator lights illuminate.
2. Select mode: Press mode button to cycle through Low, Medium, High, and Strobe settings.
3. Check battery: Observe battery indicator LEDs (4 LEDs = full, 1 LED = low).
4. Test underwater: Submerge in controlled environment to check for leaks and proper operation.

CAUTION! Never open the battery compartment underwater. Ensure unit is dry before opening.

Specifications

• Light Output: 4000 lumens maximum.
• LED Type: CREE XHP70.2 LEDs.
• Beam Angle: 120 degrees wide beam.
• Battery Capacity: 9800mAh lithium-ion.
• Run Time: Up to 3 hours on High, 10 hours on Low.
• Charging Time: 4-5 hours for full charge.
• Depth Rating: 100 meters / 328 feet.
• Dimensions: 150mm length × 80mm diameter.
• Weight: 850g in air, 350g in water.
• Operating Temperature: -10°C to 40°C (14°F to 104°F).

Controls and Operation

Control Panel: Power button, Mode button, Battery indicator LEDs.

Operation Sequence: Press power button to turn on/off. Press mode button to cycle through settings: Low (25%) → Medium (50%) → High (100%) → Strobe → SOS.

Battery Indicator: 4 LEDs indicate charge level (75-100% = 4 LEDs, 50-75% = 3 LEDs, 25-50% = 2 LEDs, 10-25% = 1 LED, <10% = flashing red).

Strobe Mode: Flashing pattern for signaling or attention. SOS Mode: Emergency distress signal pattern.

Connecting to Camera Systems

Compatible with most underwater camera housings and video rigs.

1. Turn off all equipment before connecting.
2. Attach mounting bracket to camera housing using included screws.
3. Slide light onto bracket and secure with locking lever.
4. Adjust angle: Loosen ball head, position light, then retighten.
5. For multiple lights: Use additional brackets to create lighting array.

Tip: Position light at 45-degree angle to subject for optimal illumination with minimal backscatter.

Charging & Battery Management

Use only the provided charging dock and power adapter.

1. Charging: Place light on charging dock, connect to 5V/2A power source.
2. Charging indicator: Red LED = charging, Green LED = fully charged.
3. Battery care: Charge fully before first use. Store with 50% charge if not used for extended periods.
4. Battery replacement: Contact authorized service center for battery replacement.

WARNING! Do not charge underwater. Use only in dry conditions. Do not use damaged charging equipment.

Safety Features

Overheat Protection: Automatically reduces brightness if temperature exceeds safe limits. Low Voltage Protection: Automatically shuts off when battery is critically low to prevent damage. Water Detection: Some models include moisture detection sensors. Pressure Relief Valve: Prevents pressure buildup during depth changes.

Care & Maintenance

Rinse with fresh water after each saltwater use. Dry completely before storage. Lubricate O-rings with silicone grease every 10 dives or as needed. Store in cool, dry place away from direct sunlight.

CAUTION! Never use petroleum-based lubricants on O-rings. Do not expose to temperatures above 50°C (122°F).

Regulatory Information

CE certified: Complies with European safety standards. RoHS compliant: Free of hazardous substances. FCC Part 15: Class B digital device. Transport: Lithium battery transport regulations apply. For support, visit www.bigblueunderwaterlights.com or contact [email protected].

Troubleshooting

Reset: Remove battery for 30 seconds, then reinstall.

Service: Contact authorized service center. Do not attempt to repair yourself.