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Nitecore TSL10i 4 Color Signal Light Tailcap for P10i, P10iX, P20i, P20iX and P30i Flashlights
NITECORE TSL10i 4r Color Signal Light Tailcap

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Price: $19.95

Availability: Usually Ships in 24 Hours
Product Code: ACC-NITE-TSL10I



  • Compatible with i generation flashlights (P10i, P20i, P10iX, P20iX, P23i, P35i, P30i)
  • Multiple flashing modes
  • Mode memory
  • Red/Blue police warning flashing

Included in the Box

  • TSL10I

4 Color Signal Light Tailcap for P10i, P20i, etc.

The TSL10i is an upgraded tailcap that maintains all of the original goodies and adds more - four more. Encircling the familiar dual function tail switch and mode pedal, with Nitecore's patented Strobe Ready Technology TM, is a LED ring with four different signal indicators. The TSL10i's signal ring can be set to blink blue, red, green, white, or alternating blue and red. This signal ring is independent of the flashlight and can work while the main light is on or off, providing you host of tactical options in visual identification.

Plug and Play Simple Installation and Operation

The Installation and operation of the TSL10i are incredibly simple. Just replace the standard tail cap on your P20i or i4000R. You will notice a tactile switch on the side of the tail cap that controls the signal ring. Hold this button and the TSL10i will cycle from blue - red - green - white - police (blue & red), release the switch at the desired setting and the TSL10i will start operating in that mode. To turn off the TSL10i just tap the side button. The mode memory function will return the TSL10i back to the setting you were using previously for subsequent activations.

Ready for Duty

The efficient LEDs of the TSL10i draw power straight from the flashlight's battery. The four single-color flashes all last over 300 hours or 12 days. These can be used as an emergency signals or beacons. The red-blue police warning can last over 72 hours giving duty personnel more than an entire day of field use! Built from the same tough HA III finished aero-aluminum the TSL10i brings new strengths and no weakness to your tactical light.

Note: When using with P30i model, it adds the function of adjusting the brightness from the tail end. However, the original tail cap is still needed if you plan to charge the battery inside the flashlight. The other i series models have the charging port in the front so there is no such limitation.


Dimensions L-1.82"xW-1.26"xH-1.26"
Weight 1.2oz


Blue Flashing 330 hr
Red Flashing 360 hr
Green Flashing 300 hr
White Flashing 300 hr
Red/Blue Police Warning Flashing 72 hr
Nitecore TSL10i
Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 16 Write a review »

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  0 of 0 people found the following review helpful:
5 of 5 May 13, 2023
Reviewer: Sean Simpson from Laredo, TX United States  

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  0 of 0 people found the following review helpful:
5 of 5 Great April 23, 2023
Reviewer: Lawrence Back from Yucca Valley, CA United States  
Works great mine is on the p20ix WOW find your light in the dark

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  0 of 0 people found the following review helpful:
5 of 5 January 4, 2023
Reviewer: laurie martin from Butler, GA United States  

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  0 of 1 people found the following review helpful:
5 of 5 August 14, 2022
Reviewer: Ahmad Parsa Nawabi from Ca  

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  1 of 1 people found the following review helpful:
5 of 5 Outstanding Products Excellent Customer Service July 18, 2022
Reviewer: Randy Hilliker from RIchland , MI United States  
I had recently purchased 2 i Series tactical flashlights from Nitecore as well as being a previous owner of nitecore products. Nitecore iS THE place for high quality products. Dave in customer services recently sent me for free replacement 21700 batteries that fit their i series flashlights as I had purchased the wrong  batteries initially. I am a Mechanical Engineer and I know high quality, well designed / manufactured products when I see them. Thank you Nitecore I am a customer for life

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