1. Entwodiksyon
Thank you for choosing the Harbor Freight Quantum 3700 Lumen Ultra-Bright LED Zoom Flashlight, Model QFL-3700. This manual provides essential information for the safe operation, setup, maintenance, and troubleshooting of your new flashlight. Please read this manual thoroughly before use and retain it for future reference.
The QFL-3700 is designed for powerful illumination with its 3700 lumens and adjustable zoom function, making it suitable for various tasks requiring bright, focused, or wide-area lighting.
2. Enfòmasyon sou Sekirite
- Sekirite je: Do not look directly into the LED light or shine it directly into the eyes of people or animals. The high intensity light can cause temporary vision impairment or permanent eye damage.
- Sekirite batri:
- Use only the specified battery type (12 AA Alkaline batteries).
- Ensure correct battery polarity (+/-) when installing.
- Pa melanje ansyen ak nouvo pil, oswa diferan kalite pil.
- Retire pil yo si ou pa pral itilize flach la pou yon peryòd tan pwolonje pou anpeche flit.
- Jete pil yo itilize yon fason responsab selon règleman lokal yo.
- Pa eseye rechaje pil ki pa rechargeable.
- Chalè: The flashlight may become warm during prolonged use. This is normal. Avoid covering the flashlight or placing it on heat-sensitive surfaces during operation.
- Rezistans dlo: Flach sa a se PA rezistan a dloEvite ekspoze a dlo oswa imidite ki wo pou anpeche domaj.
- Timoun: Kenbe soti nan rive nan timoun yo. Sa a se pa yon jwèt.
- Depo: Sere flach la nan yon kote ki fre, sèk lè li pa itilize.
3. Pake kontni
Tanpri tcheke pake a pou atik sa yo:
- Harbor Freight Quantum 3700 Lumen Ultra-Bright LED Zoom Flashlight (QFL-3700)
- 12 x pil AA alkalin
4. Pwodwi Features

Image 1: Diagram illustrating the key features of the QFL-3700 flashlight, including its super-bright 3700 lumens, 850 ft range, up to 13-hour run-time, adjustable focus, high-grip aluminum barrel, easy-access protected on/off switch, 12 AA battery compartment, twist-to-zoom mechanism, and ridged collar.
- Ekleraj ultra-klere: Delivers 3700 lumens for powerful light output.
- Ranje pwolonje: Projects light up to 850 feet (approximately 259 meters).
- Long Run-Time: Bay jiska 13 èdtan operasyon kontinyèl.
- Adjustable Focus (Zoom): Twist-to-zoom mechanism allows seamless transition from a wide floodlight to a narrow spotlight.
- Konstriksyon dirab: Features a high-grip aluminum barrel and aluminum body with rubber-coated ends for enhanced durability and secure handling.
- Easy Access On/Off: Protected power switch for convenient and reliable operation.
- Sous pouvwa: Li fonksyone ak 12 pil alkalin AA (enkli).
5. Enstalasyon
5.1 Enstalasyon batri
The QFL-3700 flashlight requires 12 AA alkaline batteries for operation. The batteries are included with your purchase.
- Devise bouchon dèyè flach la lè w vire l nan sans kontrè ak zegwi mont lan.
- Insert the 12 AA batteries into the battery compartment, ensuring correct polarity (+ and -) as indicated inside the compartment. Incorrect installation can prevent the flashlight from working and may damage the unit or batteries.
- Carefully screw the tail cap back onto the flashlight by turning it clockwise until it is securely tightened. Do not overtighten.
- Test the flashlight by pressing the power button.

Image 2: A hand gripping the QFL-3700 flashlight, illustrating its size and the high-grip aluminum barrel texture. This image helps visualize the handling of the flashlight during battery installation and operation.
6. Operasyon Enstriksyon
6.1 Limen/Etenyen
The power button is located on the tail cap of the flashlight. It is designed for easy access and is protected to prevent accidental activation.
- To turn the flashlight ON, firmly press the power button until it clicks.
- To turn the flashlight OFF, firmly press the power button again until it clicks.
6.2 Adjusting the Zoom (Focus)
The QFL-3700 features an adjustable focus mechanism, allowing you to switch between a wide floodlight and a concentrated spotlight.
- To adjust the focus, gently twist the head of the flashlight.
- Twist in one direction for a wider beam (floodlight).
- Twist in the opposite direction for a narrower, more focused beam (spotlight).
- Adjust the focus as needed for your specific lighting requirements.

Image 3: The Harbor Freight Quantum QFL-3700 flashlight in its full form, showcasing the head, barrel, and tail cap. This view helps users identify the components mentioned in the operating instructions.
7. Antretyen
- Netwayaj: Siye kò flach la ak yon twal mou,amp twal. Pa sèvi ak pwodui netwayaj abrazif oswa solvang.
- Ranplasman batri: Replace all 12 AA batteries when the light output diminishes significantly. Always replace all batteries at the same time with new ones of the same type.
- Depo alontèm: If the flashlight will not be used for an extended period (more than one month), remove the batteries to prevent potential leakage and damage to the flashlight.
- Lubrifikasyon: The O-rings and threads may benefit from occasional lubrication with silicone grease to maintain smooth operation of threads and prevent wear.
NAN. Depanaj
| Pwoblèm | Kòz posib | Solisyon |
|---|---|---|
| Flach pa limen. |
|
|
| Limyè a fèb oswa li ap tranble. |
|
|
| Fonksyon zoom lan rèd. |
|
|
9. Espesifikasyon
| Modèl: | QFL-3700 |
| Sous limyè: | dirije |
| Klate: | 3700 Lumen |
| Beam Range: | Jiska 850 pye (259 m) |
| Dire ekzekisyon: | Jiska 13 èdtan |
| Sous pouvwa: | 12 x pil AA alkalin |
| Materyèl: | Aliminyòm |
| Karakteristik espesyal: | Adjustable Focus (Zoom) |
| Rezistans dlo: | Pa reziste dlo |
10. Garanti ak sipò
For information regarding warranty coverage, technical support, or replacement parts, please refer to the original purchase documentation or contact Harbor Freight customer service directly. Contact details can typically be found on the official Harbor Freight websit la oubyen sou anbalaj pwodwi ou a.
Please have your product model number (QFL-3700) and purchase date available when contacting support.





