Nitecore T4K - Quad-Core Intelligent Keychain Light Manual

Q&A

Why does my T4K shut down in 30 seconds

The T4K has 2 user modes, DEMO Mode and DAILY Mode. The default setting is DEMO Mode where the product will automatically shut down if there is no operation in 30 seconds. It is recommended to switch it to DAILY Mode when in daily use.

Please follow the steps below for mode switching:

1. When the light is on/off, long press both the Power Button and the Mode Button simultaneously to switch between DEMO and DAILY Mode.
2. The LEDs will flash to indicate the current user mode: 1 flash to indicate DEMO Mode and 2 flashes to indicate DAILY Mode.

Features

• Utilizes 4 x CREE XP-L2 V6 LEDs with a max output of 4,000 lumens
• Max peak beam intensity of 10,900cd and max throw of 209 meters
• Utilizes a total reflective optic system for uniform and soft light
• Multifunctional OLED real-time display for lumens, battery voltage, runtime etc.
• Built-in 1,000mAh Li-ion battery
• Advanced Power Cut-Off (APC) technology for an ultra-low standby power consumption
• Built-in Li-ion battery charging circuit with a USB-C port
• Highly efficient constant current circuit provides a stable output up to 67 hours
• 2 user modes available (DEMO Mode and DAILY Mode)
• Dual side switch design
• 5 brightness levels available with direct access to TURBO
• Intelligent mode memory function
• 2 lockout modes available (Half Lockout Mode and Full Lockout Mode)
• Incorporated Advanced Temperature Regulation (ATR) module (Patent No. ZL201510534543.6)
• Metal ring pull able to withstand up to 30 kilograms of weight
• HA III hard-anodized finish
• Impact resistant to 1 meter

Specifications

Dimensions: 82.3mm×30mm×29.2mm
(3.24"×1.18"×1.15") (Clip Included)
Weight: 77g (2.72oz) (Clip Included)

Accessories

USB-C Charging Cable, Key Clasp

Technical Data

Note: The stated data is measured using the built-in Li-ion battery (1,000mAh) under laboratory conditions. The data may vary in real world use due to different battery usage or environmental conditions.

Operating Instructions

Product Overview

Multifunctional OLED Display

The T4K is equipped with a multifunctional OLED display. (Please remove the screen protector before the first use.) When the light is turned on, the screen will successively show the current info (Brightness Level & Lumens, Runtime Remaining, User Mode) before it goes out. After the screen goes out, short pressing the Mode Button can reactivate the screen.

Display Demonstration Function

• This function is used for demonstration ONLY. It does not reflect the actual light status.
• When the light is off, keep holding the Power Button even after ULTRALOW is accessed until the light is turned off to enter the display demonstration.
• In this status, the screen will cycle through various informational displays. Short press either button to exit this status.

On / Off

On: When the light is off, short press the Power Button to turn it on.
Off: When the light is on, short press the Power Button to turn it off.

User Modes

The T4K has 2 user modes, DEMO Mode and DAILY Mode.

DEMO Mode: The light will automatically shut down if there is no operation in 30 seconds (reactivating the screen excluded). The countdown will be displayed on the screen.

DAILY Mode: The light will not automatically shut down and will need to be shut down manually.

Note: The default setting is DEMO Mode. It is recommended to switch it to DAILY Mode when in daily use.

Mode Switching

When the light is on/off, long press both the Power Button and the Mode Button simultaneously to switch between DEMO and DAILY Mode. The LEDs will flash to indicate the current user mode: 1 flash to indicate DEMO Mode and 2 flashes to indicate DAILY Mode.
(In this process, the screen will show "DEMO" or "DAILY" to indicate the current user mode.)

Note: Reactivating the light within 3 seconds after it automatically shuts down in DEMO mode will temporarily access DAILY Mode until it is turned off.

Brightness Levels

When the light and the screen is on, short press the Mode Button to cycle through the following brightness levels: ULTRALOW – LOW – MID – HIGH. The flashlight will directly access the previously memorized brightness level when reactivated.

Note: When the screen is off, short press the Mode Button to activate the screen before adjusting the brightness level.

Direct Access to ULTRALOW

When the light is off, long press the Power Button to directly access ULTRALOW.

Direct Access to TURBO

When the light is on/off, press and hold the Mode Button to access TURBO. Release to return to the previous status.

Note:

1. When activating TURBO, a countdown progress bar will be shown on the display to indicate the activation time for TURBO after showing the current brightness level and lumens.
2. If continuing to hold the Mode Button after the progress bar is depleted, the flashlight will access HIGH Level instead and the display will turn off.
3. The activation time for TURBO depends on the thermal status of the flashlight. The higher temperature the flashlight gets, the shorter activation time for TURBO when it is reactivated.
4. Use caution when operating the light in TURBO to avoid overheating and step down to a lower level if the light becomes too hot to handle.

Lockout / Unlock

The T4K has two lockout modes (Half Lockout Mode and Full Lockout Mode).

Half Lockout Mode (Lockout 1):

• When the light is on, press and hold the Power Button until the screen shows the Lockout 1 icon. The light will turn off and access Half Lockout Mode.
• When in Half Lockout Mode, the Power Button is unavailable to activate the flashlight. Holding the Mode Button is still available for accessing TURBO.

Full Lockout Mode (Lockout 2):

• When the light is on, keep holding the Power Button even after accessing Half Lockout Mode until the screen shows Lockout 2 icon. The light will turn off and access Full Lockout Mode.
• When in Full Lockout Mode, both buttons are unavailable to activate the flashlight.

Unlock:

• In either Lockout Mode, short press and then long press the Power Button, during which the screen will show an unlock icon and a progress bar, until the flashlight is activated to exit Lockout Mode. The light will access the previous memorized level.
• The light will be automatically unlocked when being recharged in either Lockout Mode.

ATR (Advanced Temperature Regulation)

The integrated ATR technology regulates the output of the T4K according to the working condition and ambient environment to maintain the optimal performance.

Power Indication

When the light is off, short press the Mode Button to display the battery level, the battery voltage, the memorized brightness level and the current user mode before it goes out. Different voltages represent the corresponding remaining battery power levels:

Note: When the battery voltage is below 3.4V, the blue power indicator beneath both buttons will flash every 2 seconds to inform the user to recharge the battery as soon as possible.

Charging Function

The T4K is equipped with an intelligent charging system. Please charge the battery before the first use.

Connecting to the External Power: As illustrated, use the USB cable to connect an external power supply (e.g. a USB adapter, a computer or other USB charging devices) to the USB port to begin the charging process. The charging time is approx. 1 hour 30 minutes.

Charging Indicator: During the charging process, the charging indicator will flash slowly to inform the user and the screen will show the current battery level. When the battery is fully charged, the charging indicator will become steadily turned on to inform the user and the screen will display a full battery level.

Note: The light can still be activated during the charging process. (TURBO excluded)

Warnings

1. The TURBO Brightness Level of 4,000 lumens will produce massive heat rapidly during long-time activation. Use caution when operating the light in TURBO mode to avoid overheating and step down to a lower level if the light becomes too hot to handle.
2. 
   Possible dangerous radiation! Don't look into the light! May be dangerous for your eyes.
3. Please recharge the product every 3 months when left unused for a prolonged time.
4. The product contains small assembly parts. Please keep it away from children to avoid danger of choking or suffocation.
5. When the flashlight is kept in the backpack, please activate the Lockout Mode to prevent accidental activation.
6. DO NOT disassemble, modify or reconstruct the product, otherwise the warranty will be nullified, and the product might be damaged.

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download Nitecore T4K - Quad-Core Intelligent Keychain Light Manual