Introduction
Thank you for choosing the Streamlight Stinger 75783 HP LED Flashlight. This high-performance, rechargeable flashlight is designed for durability and optimal illumination in various conditions. It features a robust anodized aluminum construction, a comfortable non-slip rubber grip, and a deep parabolic reflector for a powerful, long-range beam with excellent peripheral light.
This manual provides essential information for the proper setup, operation, and maintenance of your Stinger HP LED Flashlight to ensure its longevity and performance.

Image: Angled view of the Streamlight Stinger 75783 HP LED Flashlight, showcasing its sleek black design and textured grip.
Setup and Charging
The Streamlight Stinger 75783 HP LED Flashlight comes with a 120V AC Piggyback Charger. Ensure the flashlight is fully charged before its first use to maximize battery life and performance.
- Unpacking: Carefully remove all components from the packaging. Verify that the flashlight, 120V AC Piggyback Charger, and any included accessories are present.
- Charger Placement: Select a dry, stable location for the charger. Plug the 120V AC charger into a standard wall outlet.
- Initial Charging: Insert the flashlight into the charging cradle. Ensure it is securely seated. The charging indicator light on the charger will illuminate, typically red, to indicate charging is in progress.
- Full Charge: Allow the flashlight to charge for approximately 10-12 hours for the initial charge. Subsequent charges typically take less time, depending on battery depletion. The indicator light will change color (e.g., green) or turn off when fully charged, depending on the charger model.
- Battery Installation (if replacing): The flashlight includes a rechargeable battery. If replacing, ensure the battery is inserted with the correct polarity as indicated inside the battery compartment.

Image: Side view of the Streamlight Stinger 75783 HP LED Flashlight, highlighting the power button and ribbed grip.
Operation
The Stinger HP LED Flashlight features a multi-function push-button switch for easy mode selection.
- Power On/Off: Press the push-button switch once to turn the flashlight on. Press again to turn it off.
- Mode Selection: From the ON position, rapidly press the switch to cycle through the different output modes:
- High: Maximum brightness for intense illumination.
- Medium: Balanced brightness for general use and extended run time.
- Low: Reduced brightness for close-up work or when minimal light is needed, conserving battery.
- Strobe Function: To activate the strobe mode, rapidly double-press the switch from any ON mode. Press once more to return to the previous steady mode.
- Beam Characteristics: The deep parabolic reflector is engineered to produce a concentrated, long-range targeting beam while also providing optimal peripheral illumination, allowing for a wide field of view.

Image: Diagram illustrating the High Performance (HP) beam pattern, showing a focused central beam with wide peripheral spill.

Image: A man using the Streamlight Stinger flashlight to illuminate and inspect intricate components of an engine, demonstrating its utility in detailed work.
Maintenance
Proper maintenance will ensure the longevity and optimal performance of your Streamlight Stinger HP LED Flashlight.
- Cleaning: Clean the flashlight body with a soft, damp cloth. Avoid abrasive cleaners or solvents that could damage the anodized finish or rubber grip.
- Lens Care: The unbreakable polycarbonate lens has an anti-scratch coating. Clean the lens gently with a clean, soft cloth. For stubborn smudges, a small amount of lens cleaner designed for optics can be used. Do not use harsh chemicals.
- O-Rings: The flashlight is O-ring sealed for water resistance. Periodically inspect the O-rings for any signs of wear or damage. If necessary, apply a thin coat of silicone grease to keep them pliable and maintain the seal. Replace damaged O-rings promptly.
- Battery Care:
- Always use the provided 120V AC Piggyback Charger.
- Do not overcharge the battery. Once fully charged, remove the flashlight from the charger if not needed for immediate use.
- If storing the flashlight for an extended period, ensure the battery is partially charged (around 50%) and recharge it every few months to prevent deep discharge.
- Storage: Store the flashlight in a cool, dry place away from direct sunlight and extreme temperatures.
Troubleshooting
If you encounter issues with your Streamlight Stinger HP LED Flashlight, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Flashlight does not turn on. | Battery is depleted or not properly installed. | Charge the battery fully. Ensure the battery is correctly inserted with proper polarity. |
| Light is dim or flickers. | Low battery charge or loose connections. | Recharge the battery. Check the battery cap and ensure it is tightened securely. |
| Charger indicator light not illuminating. | Charger not plugged in, faulty outlet, or poor contact with flashlight. | Verify the charger is securely plugged into a working outlet. Ensure the flashlight is properly seated in the charging cradle. |
| Water ingress. | Damaged or improperly seated O-rings. | Inspect O-rings for damage or debris. Clean and lubricate O-rings, or replace if damaged. Ensure all caps are tightly sealed. |
If the problem persists after attempting these solutions, please contact Streamlight customer support for further assistance.
Specifications
Detailed specifications for the Streamlight Stinger 75783 HP LED Flashlight:
| Feature | Detail |
|---|---|
| Brand | Streamlight |
| Model Number | 75783 |
| Color | Black |
| Power Source | Battery Powered (Rechargeable) |
| Voltage | 14.4 Volts (DC) |
| Weight | 386 g (13.6 oz) |
| Construction Material | Anodized Aluminum with Non-slip Rubber Grip |
| Lens Material | Unbreakable Polycarbonate with Anti-scratch Coating |
| Sealing | O-ring sealed |
| Charger Type | 120V AC Piggyback Charger |
Performance Specifications (FL1 Standard)

Image: Table detailing the FL1 Standard performance metrics for High, Medium, and Low modes, including Lumens, Run Time, Beam Distance, and Candela.
| Mode | Lumens | Run Time | Beam Distance | Peak Beam Intensity (Candela) |
|---|---|---|---|---|
| High | 350 | 2 hours | 473 meters | 56,000 cd |
| Medium | 175 | 3 hours 45 minutes | 335 meters | 28,000 cd |
| Low | 85 | 7 hours 15 minutes | 237 meters | 14,000 cd |
Warranty and Support
Streamlight products are known for their quality and durability. For specific warranty information regarding your Stinger 75783 HP LED Flashlight, please refer to the warranty card included with your product or visit the official Streamlight website.
For technical support, service, or to inquire about replacement parts, please contact Streamlight Customer Service directly. Contact information can typically be found on the Streamlight website or on the product packaging.
Note: Information regarding spare parts availability is not provided in this manual. Please contact the manufacturer for details.





