Technical Specifications


Head Dia.
1.9 inches (47 mm)
Body Dia.
1 inches (25.4 mm)
6.9 inches (175.3 mm)1
5.5 ounces (155.1 grams)
w/o battery
8.0 ounces (225.6 grams)
w/ battery

Battery Type

Operating voltage

  • 2.7V - 4.2V

What's included

  • S25V flashlight
  • 3.7V 5000mAh 21700 rechargeable protected li-ion battery (10A discharge)
  • Heavy duty nylon holster
  • Type-C USB charging cable (2feet/0.6meter) w/ AWG22 copper wire
  • 10A high current forward clicky tailcap
  • Removeable harden stainless steel deep pocket clip in black harden titanium alloy finish
  • Spare o-rings
  • User Manual
  • Mil-Spec Para-cord Lanyard w/ quick attachment clip

Carrying method

  • Para-cord lanyard with quick attachment clip
  • Heavy duty nylon holster


  • IPX-8 standard

Replaceable items

  • Lens


  • Smooth aluminum reflector


  • HAIII hard anodization aerospace aluminum

Optional accessories

  • 3.7V 5000mAh 21700 rechargeable protected li-ion battery (10A discharge)
  • 5V 2A USB car charger
  • 18650 - 21700 Spacer
  • Add-on diffuser filter with flip-cover feature
  • Pressure Pad Tail-cap w/ Forward clicky (10" Straight Cord)
  • (US only) UL certified 5V 2A USB charger
  • (EU only) TUV/GS/CE certified 5V 2A USB charger
  • Lens


  • Osram KW CSLPM1.F1 Cool White LED

Beam Profile

Osram KW CSLPM1.F1 Cool White LED

  • Center lux: 110,300 lux
  • Center spot angle: 4°
  • Spill light angle: 56°
  • Beam distance: 724 yards / 664 meters


  • Waterwhite glass lens w/ harden treatment
  • Anti-reflective (AR) coating on both side (96% transparency)

C4000 LED circuit

  • Current regulated buck converter with external ultra low resistance power mosfet which offers up to 96% efficiency7
  • Uses low-ESR MLCC and tantalum capacitor for input and output decouple
  • Uses molded power inductor for higher saturation current and less electromagnetic interference
  • Current regulated output (non-PWM) for all brightness levels without flicking
  • Active thermal management feature (adjustment range 60%-100%)5
  • Zero standby current

C2500 Type-C charging circuit

  • Charges with any regular/PD USB adapter (2A or higher recommeded)
  • Highly efficient step-down charging IC
  • Constant current / Constant voltage charging algorithm
  • High 2.4A charging current
  • Very high charging voltage accuracy (1%)
  • Small current charge for low voltage battery
  • No trickle charge when battery is full
  • Uses four large capacity MLCC for input and output decouple
  • Uses durable shielded inductor
  • Economic charging function to extend battery life cycle (with tailcap switch in off position during charge)

Output and Runtime

  • Three brightness levels
  • Programmable Medium and Low levels
    • Led lumen:
      • Max: 1200-9105
      • Medium: 640-450-270-Strobe
      • Low: 55-20-7-Strobe
    • ANSI FL-1 lumen:
      • Max: 960-7455
      • Medium: 525-370-220-Strobe
      • Low: 46-17-6-Strobe
    • Runtime6:
      • Max: 2-3 hrs
      • Medium: 3.5-5.2-8 hrs
      • Low: 45-100-250 hrs
    • Four hidden auxiliary outputs
      • Disorienting strobe/Flash/S.O.S./Beacon
      • User programmable tailcap strobe


Basic operations:
  • Turn on the light by pressing the tailcap button until it clicks.
  • Twist the head to select between three output levels.
  • Pre-selected output level before turning on the light.
  • Cycle through auxiliary modes: tight the head (1st level), and loose the head (3rd level) and then tight the head within one second to enter auxiliary setting. Repeat to cycle through all settings. Turn off the light or loose the head to quit.
  • Advanced operation
    • Choose one of the four levels as the default medium output: Switch to medium output and turn the flashlight on and off for 20 times to cycle through the next output setting.
    • Choose one of the four levels as the default low output: Switch to low output and turn the flashlight on and off for 20 times to cycle through the next output setting.
    • Tail strobe feature (off by default): With this enabled, you can access strobe output at the tailcap switch button . To toogle this function, switch to 1st level and turn the flashlight on and off 20 times. With the tailcap strobe setting enabled, a double press of the switch button will activate the strobe output.
    Battery charging:8
    • Remove the waterproof cover and insert the included type-c charging cable to charge the battery.
    • The signal LED located at the waterproof cover indicates the charging status. Signal LED shuts off when charging is completed at 100% (it will not shut off when charging limit is set to 80% i.e. switch at off position).
    • During charge, switch on the flashlight switch at the tailcap to charge to 100%. Leaving the switch in off position will only charge the battery to 80% (extend battery life cycle).
    • Time to fully charge a depleted 21700 5000mAh battery is 3-4 hours


    Other features

    • LED direct soldering on copper for maximum heatsink ability
    • User replaceable glass lens
    • Battery reverse polarity protection
    • Ultra low internal resistance phosphor bronze springs (silver coated)
    • Spring loaded positive and negative terminal
    • One piece head design for maximum heat transfer


    Battery Safety Precaution

    Ensure the battery has current discharge ability of 10A or higher. Always use proven EAGTAC batteries for best performance and reliability.

    All EAGTAC flashlights are designed to use button-top battery (battery with protruding positive terminal). For rechargeable li-ion battery, use only EAGTAC li-ion battery, or other protected li-ion battery with compatible length and diameter. Before using the battery, check and ensure the battery outer wrapping (the isolating plastic film that wraps around the metal housing of the battery) is complete. Broken battery wrapping may lead to short circuit and damage to the flashlight.

    Lithium and Li-ion battery can explode or cause burns if disassembled, shorted, or exposed to high temperature. Do not mix new and used batteries. Do not mix batteries with different brand, capacity, voltage, or install batteries backwards.

    NiMH rechargeable battery may release gas during discharge. If you experience an inflated switch boot or find high pressure being built inside the flashlight, switch off the flashlight immediately. Slowly loosen the tail-cap to reduce the internal pressure and replace all batteries.     Back to top

    Flashlight Maintenance

    Periodically clean the threads and o-rings with a lint free cloth and apply a thin coating of EAGTAC synthetic grease to the o-rings and threads. After prolonged exposure to moisture, the head and batteries should be removed, inspected, and dried. Do not touch or attempt to clean the reflector, as it will scratch the reflective coating permanently.     Back to top

    1. This weight measurement includes battery
    2. All batteries must have protruding top button. Protected li-ion battery with 2.5V low voltage cut-off setting is recommended.
    3. Beam output diameter taken at one meter
    4. ANSI FL-1 Lumens is a measurement of light output standardized by American National Standards Institute for use with flashlights. This ANSI Lumen measurement is the total overall light output being emitted from the flashlight measured in a calibrated integrated sphere. This measurement is generally more accurate as it takes into consideration the loss from reflector/lens/bezel.
    5. After 30 seconds at maximum output level (100%), the active thermal management feature will be activated and continuously adjusts the maximum output level according to the flashlight internal tempearture. The adjustment output range is between 60% to 100%. This feature maintains the flashlight surface temperature to be about 140°F (60 °C) (higher surrounding temperaturemay result in higher flashlight temperature). It's normal for high power flashlight to run hot at MAX level. Reduce the output if the user finds the flashlight too warm to hold.
    6. Runtime is measured using one EAGTAC 21700 5000mAh high discharge (10A) li-ion batteries. MAX level runtime includes out-of-current regulation time period when battery is almost depleted. With active thermal management feature, runtime in cooler environment will have shorter runtime (higher MAX output) and long runtime in hotter environment (lower MAX output).
    7. To charge a deeply discharged protected li-ion battery, the flashlight internal charging circuit will use small current to charge the battery. Usually it takes at least a few minutes for the charging circuit to bring the deeply discharged battery voltage to higher than 3.0V (which is the no-load voltage required to disable the over-charge lock-out on the battery protection circuit). If the protected li-ion battery fails to activate, contact our customer services about your situation and we may find other ways to activate it.