Introduction
The GearLight S1000 LED Tactical Flashlight is a powerful and versatile illumination tool designed for a wide range of applications, from everyday tasks to outdoor adventures and emergency situations. Its robust construction and advanced features ensure reliable performance when you need it most.
This manual provides detailed instructions on how to set up, operate, maintain, and troubleshoot your S1000 flashlight to ensure optimal performance and longevity.
Package Contents
Upon opening your GearLight S1000 package, please verify that all the following items are included:
- (2) GearLight S1000 LED Tactical Flashlights
- (2) Built-in Lithium-Ion Batteries (pre-installed)
- (2) 19-inch USB-C Charging Cables
- (2) Hand Straps
- (1) Holster
- (1) Operation Guide (this manual)

Figure 1: Included items in the GearLight S1000 2-Pack Rechargeable package.
Key Features
- Bright & Rechargeable: The S1000 provides powerful illumination with multiple modes and a zoomable beam, powered by a CREE LED. It features a built-in rechargeable lithium-ion battery for long-lasting performance.
- Dual-Button Design: Equipped with two power buttons—one on the side and one on the tail—for convenient operation and quick access in various situations.
- USB-C Fast Charging: Features a built-in 3.7V 2000mAh lithium-ion battery that charges quickly via USB-C, ensuring your flashlight is always ready.
- Lightweight & Pocket-Sized: Compact and easy to carry, fitting comfortably in a pocket, backpack, or glove compartment, making it ideal for travel and emergency kits.
- Durable & Weather-Resistant: Constructed from military-grade aluminum with an anti-roll body design. It is IPX4 water-resistant and can withstand drops up to 10 feet.

Figure 2: The S1000 flashlight providing powerful illumination in a dark environment.

Figure 3: Detailed view of the S1000's durable construction and key design elements.

Figure 4: The S1000's resilience against water and impact.
Setup and Charging
The GearLight S1000 comes with a built-in rechargeable lithium-ion battery. Before first use, it is recommended to fully charge the flashlight.
- Locate the Charging Port: Twist the tail end of the flashlight to reveal the USB-C charging port.
- Connect the Cable: Insert one end of the provided USB-C charging cable into the flashlight's port and the other end into a compatible USB power source (e.g., wall adapter, computer USB port, power bank).
- Charging Indicator: The charging indicator light (usually near the charging port or power button) will illuminate to show charging status. Refer to the flashlight's specific indicator behavior (e.g., red for charging, green for fully charged).
- Full Charge: Allow the flashlight to charge until the indicator shows a full charge. Charging time may vary depending on the power source.
- Secure the Port: Once charging is complete, remove the USB-C cable and twist the tail end back to cover and protect the charging port from dust and water.

Figure 5: Accessing the USB-C charging port by twisting the tail end.
Operating Instructions
The S1000 flashlight features a dual-button design and multiple lighting modes for various needs.
Power On/Off
- Side Button: Press the side power button to turn the flashlight ON or OFF.
- Tail Button: Press the tail cap button to turn the flashlight ON or OFF. This button often provides momentary on/off functionality with a half-press.
Changing Lighting Modes
The S1000 offers 5 lighting modes: High, Medium, Low, Strobe, and SOS.
- With the flashlight ON, quickly press the side power button repeatedly to cycle through the modes: High → Medium → Low → Strobe → SOS → High.
- Alternatively, with the flashlight ON, lightly tap the tail cap button (without fully clicking) to cycle through the modes. A full click will turn the flashlight off.
Zoom Function
The S1000 features a zoomable beam to adjust between a wide floodlight and a focused spotlight.
- To adjust the beam, simply push or pull the head of the flashlight forward or backward.
- Pulling the head forward will narrow the beam for a focused spotlight.
- Pushing the head backward will widen the beam for a broad floodlight.
Maintenance
Proper maintenance ensures the longevity and optimal performance of your GearLight S1000 flashlight.
- Cleaning: Wipe the flashlight body with a soft, damp cloth. Do not use abrasive cleaners or solvents. Keep the lens clean for maximum light output.
- Lubrication: Periodically apply a thin layer of silicone grease to the O-rings and screw threads (e.g., tail cap threads) to maintain water resistance and smooth operation.
- Storage: Store the flashlight in a cool, dry place away from direct sunlight and extreme temperatures. If storing for extended periods, ensure the battery is partially charged (around 50%) to preserve battery health. Recharge every 3-6 months if not in use.
- Avoid Disassembly: Do not attempt to disassemble the sealed head or other components beyond what is necessary for charging or basic cleaning, as this may void the warranty and damage the flashlight.
Troubleshooting
If you encounter issues with your GearLight S1000 flashlight, try the following solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Flashlight does not turn on. | Battery is depleted. Loose tail cap. Damaged internal components. | Charge the battery fully. Tighten the tail cap securely. Contact customer support if issue persists. |
| Light is dim or flickers. | Low battery. Dirty lens or contacts. | Recharge the battery. Clean the lens and ensure contacts are free of debris. |
| Cannot change modes. | Incorrect button press. Software glitch. | Ensure quick, successive presses of the side button or light taps of the tail button. Try turning off and on again. |
| Charging indicator not working. | Faulty cable or power source. Charging port obstruction. | Try a different USB-C cable and power source. Check charging port for debris. |
Specifications
| Feature | Detail |
|---|---|
| Model | S1000 |
| Light Source Type | LED (CREE) |
| Power Source | Battery Powered (Rechargeable) |
| Battery Type | Built-in 3.7V 2000mAh Lithium-Ion |
| Charging Port | USB-C |
| Material | Military-Grade Aluminum |
| Water Resistance Level | IPX4 Water Resistant |
| Drop Resistance | Up to 10 feet |
| Product Dimensions | 6.1"D x 1.57"W x 1.57"H |
| Item Weight | 1.1 pounds (for 2-pack) |
| UPC | 850021168520 |
Warranty and Support
For warranty information, technical support, or any inquiries regarding your GearLight S1000 flashlight, please visit the official GearLight website or contact their customer service directly.
You can also visit the GearLight Store on Amazon for more product information and support resources.




