1. Introduction
The K KASONIC CT-505 LED Rechargeable Flashlight is a versatile and durable illumination tool designed for various applications, including outdoor activities, emergency situations, and general household use. It features a high-power LED, multiple lighting modes, a telescopic zoom function, and a built-in rechargeable battery with power bank capability.

Image 1.1: K KASONIC CT-505 LED Rechargeable Flashlight with key features.
2. Safety Information
- Eye Safety: 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.
- Battery Safety: Use only the specified rechargeable battery. Do not attempt to disassemble, puncture, or short-circuit the battery. Keep batteries away from heat sources and open flames.
- Charging: Use the provided Type-C charging cable. Do not use damaged cables or chargers. Ensure the charging port cover is securely closed when not charging to maintain water resistance.
- Heat: The flashlight may become warm during prolonged use, especially on high mode. This is normal. Avoid touching the head of the flashlight for extended periods when hot.
- Water Resistance: The flashlight has an IPX4 water resistance rating, meaning it is protected against splashing water from any direction. It is not designed for submersion in water.
- Window Breaker: The flashlight features a window breaker. Use this feature only in emergency situations. Exercise caution to avoid injury.

Image 2.1: Flashlight demonstrating its window breaker feature.
3. Package Contents
Verify that all items are present in the package:
- K KASONIC CT-505 LED Rechargeable Flashlight
- Rechargeable Lithium-Ion Battery (pre-installed with insulator tab)
- USB Type-C Charging Cable
- Lanyard
4. Product Overview
The K KASONIC CT-505 flashlight is constructed from aviation-grade aluminum alloy, ensuring durability. It features a P70 LED chip for powerful illumination.
Key Components:
- LED Head: Contains the P70 LED and the adjustable zoom mechanism.
- Power Button: Controls power and light modes.
- Battery Level Indicators: Four blue LED lights indicating battery charge status.
- Type-C Charging Port: For recharging the internal battery.
- USB-A Output Port: Functions as a power bank to charge other devices.
- Tail Cap: Secures the battery compartment.
5. Setup
5.1 Battery Installation
Before first use, the plastic insulator gasket must be removed from the battery compartment.
- Unscrew the tail cap of the flashlight by turning it counter-clockwise.
- Remove the plastic insulator gasket located at the end of the battery.
- Insert the battery with the positive (+) terminal facing inwards towards the LED head and the negative (-) terminal facing outwards towards the tail cap.
- Screw the tail cap back on clockwise until secure.

Image 5.1: Steps for battery installation and insulator tab removal.
6. Operating Instructions
6.1 Power On/Off and Mode Selection
- To Turn On: Press the power button once. The flashlight will turn on in High mode.
- To Change Modes: While the flashlight is on, press the power button repeatedly to cycle through the modes: High → Medium → Strobe.
- To Turn Off: Long press the power button for 3 seconds in any mode.

Image 6.1: Visual representation of the three lighting modes.
6.2 Telescopic Zoom Function
The flashlight features an adjustable head for focusing the beam.
- Spotlight: Extend the head of the flashlight forward to narrow the beam for long-distance illumination.
- Floodlight: Retract the head of the flashlight backward to widen the beam for broad area illumination.

Image 6.2: Demonstrating the telescopic zoom for floodlight and spotlight.
7. Charging
7.1 Recharging the Flashlight
The K KASONIC CT-505 flashlight is equipped with a Type-C charging port.
- Locate the Type-C charging port on the side of the flashlight, usually protected by a rubber cover.
- Open the rubber cover.
- Connect the provided USB Type-C cable to the flashlight's charging port and the other end to a USB power source (e.g., wall adapter, computer, power bank).
- The battery level indicator lights will illuminate to show charging progress. Each light represents approximately 25% of the battery level.
- When fully charged (approximately 2-3 hours), all four LED indicator lights will be solid and then automatically turn off to prevent overcharging.
- After charging, securely close the rubber cover to maintain water resistance.
7.2 Power Bank Function
The flashlight can also serve as a power bank to charge other devices in emergencies.
- Locate the USB-A output port (typically next to the Type-C input port).
- Connect your device's charging cable to the USB-A output port on the flashlight.
- The flashlight will begin charging your device.

Image 7.1: Flashlight acting as a power bank and displaying battery level indicators.
8. Maintenance
- Cleaning: Wipe the flashlight body with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the flashlight in a cool, dry place away from direct sunlight and extreme temperatures. If storing for an extended period, charge the battery periodically to maintain its health.
- Battery Care: If the flashlight will not be used for a long time, it is recommended to remove the battery to prevent potential leakage or damage.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Flashlight does not turn on. | Battery is dead or not installed correctly. Insulator tab not removed. | Charge the battery. Ensure the battery is inserted with correct polarity and the insulator tab is removed. |
| Flashlight does not charge. | Charging cable or adapter is faulty. Charging port is dirty. | Try a different USB Type-C cable and power adapter. Clean the charging port gently. |
| Light output is dim. | Low battery level. Lens is dirty. | Recharge the battery. Clean the flashlight lens. |
| Power button is unresponsive. | Internal malfunction. | Contact customer support for assistance. |
10. Specifications
| Feature | Detail |
|---|---|
| Model Number | CT-505 |
| Light Source | P70 LED |
| Brightness | Up to 1000 Lumens |
| Beam Distance | Up to 4,921 feet (approx. 1500 meters) |
| Light Modes | High, Medium, Strobe |
| Zoom Function | Telescopic (Spotlight to Floodlight) |
| Battery Type | Rechargeable Lithium-Ion (18650) |
| Charging Port | USB Type-C |
| Charging Time | 2-3 hours |
| Runtime | Up to 18 hours (on low mode) |
| Power Bank Output | USB-A |
| Material | Aviation Grade Aluminum Alloy |
| Water Resistance | IPX4 (Moisture Resistant) |
| Dimensions | Approx. 20D x 20W x 20H millimeters (6 inches long) |
| Weight | Approx. 280g (8.54 oz) |
11. Warranty and Support
The K KASONIC CT-505 LED Rechargeable Flashlight comes with a 2-year manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
What the Warranty Does Not Cover:
- Damage caused by misuse, abuse, accident, or neglect.
- Unauthorized repairs or modifications.
- Normal wear and tear.
Customer Support:
For warranty claims, technical assistance, or any questions regarding your K KASONIC CT-505 flashlight, please contact our customer support team. Refer to your purchase documentation for specific contact details or visit the official K KASONIC website.