Surefire digital 2 ultra

Surefire digital 2 ultra DEFAULT

FAQ /

My LED flashlight does not turn on — what's wrong?

  • First install fresh batteries, positive-end forward. 95% of non-working SureFire flashlights are due to dead or reversed batteries.
  • If the flashlight does not turn on with fresh batteries installed, perform the "paper clip test" as follows: 1. With the new batteries still in the light, unscrew and remove the tailcap. 2. Using a metal object such as a paper clip or key, simultaneously touch the flat center of the exposed battery terminal and the rear metal rim of the flashlight; the flashlight should turn on.
  • If the flashlight does not turn on using the paper clip test with fresh batteries installed, the problem may be dirty or greasy tailcap threads. Refer to the question below, "What parts of my flashlight need to be maintained?", paying attention to the information on cleaning.
  • If the flashlight does turn on using the paper clip test with fresh batteries installed but it does not turn on with the tailcap installed, the problem may be dirty or greasy tailcap threads. Refer to the question below, "What parts of my flashlight need to be maintained?", paying attention to the information on cleaning.
  • If the flashlight does not turn on after cleaning the threads, it may be the tailcap switch, although failures of our simple "tactical" switches are extremely rare. At this point, please call SureFire at and ask for Customer Service.
  • If the flashlight does not turn on after cleaning the threads, it may be the tailcap switch, although failures of our simple "tactical" switches are extremely rare. At this point, please call SureFire at and ask for Customer Service.

My LED flashlight flickers when I turn it on — what's wrong?

  • This is almost always caused by the batteries being nearly depleted. Replace the batteries.

My dual-output flashlight only works at the low-output setting — what's wrong?

  • By design,when the batteries are nearly depleted only the low-output setting works. This serves as a warning while still leaving you with usable light. Replace the batteries.

I can't remove the head of my flashlight — what's wrong?

  • The heads of some SureFire flashlights and WeaponLights are fixed in place and are not meant to be removed. If the head of your illumination tool cannot be unscrewed with moderate hands-only effort, then it is not meant to be removed.
  • Removing or attempting to remove a fixed illumination tool head will VOID YOUR WARRANTY. If you have any questions about your illumination tool, call SureFire Customer Support at

What parts of my flashlight need to be maintained?

  • Clean threads of tailcap and head using cloth, paper towel, or similar absorbent material.
  • Clean flat surface at end of threaded section and corresponding area inside the tailcap to ensure positive electrical contact between tailcap, head, and body.
  • Remove dirt or debris from O-rings and use a cotton swab or similar to lightly coat them with silicone grease, such as Nyogel or SCUBA equipment grease.
  • NOTE: Grease only the O-rings, not the threads. Do not use spray lubricants. Do not use petroleum-based lubricants. Do not use acidic, alkaline, or petroleum solvents to clean any part of your light.

How do I lock out my flashlight's tailcap switch?

  • First make sure your flashlight is functioning. Then unscrew the tailcap until the light will not turn on when you press the tailcap switch, or when you wiggle the tailcap from side to side.
    If the flashlight does not turn on, the tailcap switch is locked out. You may wish to unscrew the tailcap another ¾ turn to be absolutely certain it's locked out. If your tailcap has a small "scoop" mark in the rim, use this for future reference to determine how much the tailcap should be unscrewed to lock out the switch.
  • NOTE: After locking out your flashlight, always push the tailcap switch to make sure it is truly locked out.

If my light did not come with a pocket clip, can I buy one and install it?

  • No. Pocket clips will only fit flashlight models that originally come with them since they require a special slot for attachment.

How do I remove muzzle gas deposits on the window or lens?

  • Remove the deposits using a clean, dry pencil eraser, rubbing in a circular motion.

How do I get the batteries out of my Executive Series or my E1B or my EB1 flashlight?

  • Remove the head of the flashlight to access and replace the batteries.

My headlamp does not turn on — what's wrong?

  • First install fresh batteries, positive-end forward. 95% of non-working SureFire lights are due to dead or reversed batteries.
  • If the headlamp does not work with new batteries, perform the "paper clip test" as follows: 1. With the fresh batteries installed, unscrew and remove the battery compartment cap. 2. Using a metal object such as a paper clip or key, simultaneously touch the flat center of the exposed battery terminal and the rear metal rim of the battery compartment. NOTE: The headlamp's output control knob must be turned to any ON position for the test to work.
  • If the headlamp still does not turn on using the paper clip test with fresh batteries installed, the problem may be dirty or greasy battery compartment and cap threads. Refer to the question below, "What parts of my headlamp need to be maintained?", paying attention to the information on cleaning.
  • If the headlamp does not turn on after cleaning the threads, it may be the switch, although failures are extremely rare. At this point, please call SureFire at and ask for Customer Service.

My headlamp blinks, or flickers, or runs only in the low-output mode — what's wrong?

  • By design,when the batteries are nearly depleted the headlamp will blink or flicker and the headlamp will only run at the low-output level. This serves as a warning while still leaving you with usable light. Replace the batteries.

What parts of my headlamp need to be maintained?

  • Clean threads of battery compartment and cap using cloth, paper towel, or similar absorbent material.
  • Clean flat surface at end of battery compartment threaded section and corresponding area inside the cap to ensure positive electrical contact between tailcap, head, and body.
  • Remove dirt or debris from O-rings and use a cotton swab or similar to lightly coat them with silicone grease, such as Nyogel or SCUBA equipment grease.
  • NOTE: Grease only the O-rings, not the threads. Do not use spray lubricants. Do not use petroleum-based lubricants. Do not use acidic, alkaline, or petroleum solvents to clean any part of your light.

My WeaponLight does not turn on — what's wrong?

  • First install fresh batteries, positive-end forward. 95% of non-working SureFire illumination tools are due to dead or reversed batteries.
  • If the WeaponLight still does not turn on with fresh batteries installed, the problem may be dirty or greasy battery compartment threads. Refer to the question below, "What parts of my WeaponLight need to be maintained?", paying attention to the information on cleaning.
  • If the WeaponLight does not turn on after cleaning the threads, it may be the switch, although failures are extremely rare. At this point, please call SureFire at and ask for Customer Service.

What parts of my WeaponLight need to be maintained?

  • Clean mating threads of battery compartment, including flat sections at end, using cloth, paper towel, or similar absorbent material.
  • Remove dirt or debris from O-rings and use a cotton swab or similar to lightly coat them with silicone grease, such as Nyogel or SCUBA equipment grease.
  • NOTE: Grease only the O-rings, not the threads. Do not use spray lubricants. Do not use petroleum-based lubricants. Do not use acidic, alkaline, or petroleum solvents to clean any part of your light.

How do I remove gunfire residue from my WeaponLight's window?

  • Remove the deposits using a clean, dry pencil eraser, rubbing in a circular motion.

Are disposable A batteries rechargeable?

  • No! Do not try to recharge them, as this can be dangerous.

Aren't all disposable A batteries the same?

  • No! Many counterfeit or inferior lithium batteries don't have the power output characteristics or built-in fault (short-circuit) protection that SureFire batteries have. This can cause poor performance or even be dangerous to you and your SureFire illumination tools.

If I use non-SureFire brand batteries will my warranty be voided?

  • Using genuine Panasonic®, Duracell® or Energizer® batteries will not void your warranty, but using any other non-SureFire brand will void it.

How can I be certain that my SureFire battery is not counterfeit?

  • Buy SureFire brand batteries from www.surefire.com, or from an authorized SureFire dealer.

How do I get the batteries out of my Executive Series or my E1B or my EB1 flashlight?

  • Remove the head of the flashlight to access and replace the batteries.

Is the power output of rechargeable LFPA batteries the same as disposable A batteries?

  • The discharge power is very similar, which means that your illumination tool will have similar lumen output. However, rechargeable batteries will be depleted in about half the time of the disposable batteries.

What is the shelf life of rechargeable LFP A batteries?

  • Shelf life is several years when the batteries are stored away from high temperature conditions, but they should be recharged after 2 years of sitting idle.

Can rechargeable LFP A batteries be used in SureFire rechargeable flashlights?

  • Yes. They must be inserted into an included battery magazine, which is then inserted into the flashlight.

Can I put a rechargeable LFP A battery and a disposable A battery together into an illumination tool?

Can I put a charged LFP A battery and a depleted LFP A battery together into an illumination tool?

  • Avoid doing this. There is no safety hazard, but it is possible that the charged cell could damage the discharged cell. We recommend fully charging all cells before placing them into an illumination tool.

Can I put an old rechargeable LFP A battery and new rechargeble LFP A battery together into an illumination tool?

  • Yes. However, the runtime of your illumination tool may be reduced.

Can rechargeable LFP A batteries be used in incandescent (non-LED) illumination tools?

  • We do not recommend it because the slightly higher initial voltage of charged LFP A batteries may burn out lamp filaments. Use our rechargeable batteries only with LED illumination tools that also use disposable A batteries.

If rechargeable or disposable batteries are in my "dual-fuel" rechargeable SureFire flashlight and then I plug the flashlight into the charger, what will happen?

  • Nothing. The battery magazine is designed so that it does not allow an electrical connection with the charger when the latter is plugged into the flashlight.

What do the colors on my SureFire battery charger mean?

  • The light is red when the battery (or batteries) is taking a charge. It turns green when the charging process is complete.

Are SureFire products made in the USA?

  • Many SureFire products are completely made in the USA. Some are almost completely made in the USA, but have imported components
Sours: https://www.surefire.com/faq/

SureFire U2 Ultra Flashlight U2-BK-WH is a compact (palm size) high-intensity variable-output SureFire LED flashlight for tactical, duty, and general use. Surefire U2-BK-WH U2 Ultra Personal Flashlight uses a virtually indestructible light-emitting diode (LED) to provide six output levels, from a long-running low beam to a brilliant white tactical-level high beam with over five times the light of a big two D-cell flashlight. Ring selector of Sure Fire Black Anodized White LED Ultra Flashlight U2 provides instant output control. Electronic current regulation maintains a more consistent level of light output for the useable life of the batteries. Variable output, compact size, extended-runtime low beam and high-output beam capability, and year battery shelf life also make this small flashlight from Sure Fire perfect for backpacking or camping and for disaster preparedness kits.

Specifications for Sure-fire Ultra U2 Small Flashlights:

Features of Outdoor SureFire U2 Ultra White LED Black Flash Lights U2-BK-WH:

  • Six selectable levels of light output from 5-watt LED
  • LED light source has no filament to burn out or break, lasts for thousands of hours
  • Rugged aerospace-grade aluminum body, Mil-Spec Type III hard anodized in black
  • O-ring sealed, weatherproof
  • Tempered Pyrex window
  • Heavy-duty pocket clip
  • Tailcap switch: press for momentary-on, press further to click constant-on
  • Switch lockout prevents accidental activation during transport or storage

Package Contents:

  • SureFire U2 Ultra Flashlight U2-BK-WH
  • Two A Lithium Batteries

SureFire provides NSN (National/ NATO Stock Numbers) for numerous Flash Lights, Tactical Weaponlights, Flashlight Accessories, and some other Sure Fire products.

Government National Stock Number (NSN Number) for SureFire U2 Ultra LED Flashlights U2-BK-WH is: NSN

To see the list of all SureFire NSN Flashlights & Flash Light Accessories please visit Surefire NSN National/ NATO Stock Numbers page.

Sours: https://www.opticsplanet.com/surefire-handheld-flashlight-u2-bk-wh.html
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SureFire U2 Ultra Flashlight - U2-BK-WH

IMPROVED PERFORMANCE -- Compact (palm sized), high-intensity, variable-output LED flashlight for tactical, duty, and general use. Uses a virtually indestructible light emitting diode (LED) to provide six output levels, from a long-running low beam suitable for map reading, to a brilliant tactical-level high beam with five times the light of a big two-D-cell flashlight. The U2's selector ring provides instant output control, and electronic current regulation maintains a more consistent level of light output for the usable life of the batteries. At the high setting the U2 will put out two hours of tactical level light (50+ lumens from an LED source) with a total runtime of three hours. At the lowest setting it will run for hours. The combination of features in the U2 compact size, extended runtime and high output capabilities, along with the year shelf life of A batteries make it perfect for backpacking, camping, or disaster preparedness kits.

FEATURES:
  • Six levels of light output from 5-watt LED
  • LED light source has no filament to burn out or break
  • Rugged aerospace-grade aluminum body, Mil-Spec Type III hard anodized
  • O-ring sealed, weatherproof
  • Tempered Pyrex® window
  • Heavy-duty pocket clip
  • Tailcap switch: press for momentary-on, press further to click constant-on
  • Switch lockout prevents accidental activation during transport or storage


SPECIFICATIONS:
  • Max Output:
    • High: lumens
    • Low: 2 lumens
  • Runtime:
    • High setting: 2 hours
    • Low setting: hours
  • Length: inches
  • Weight: ounces with batteries
  • Battery: Two A lithiums
  • KL5A Head with SSC P4 LED


Please Note: This item cannot be exported from the USA. The only exception is for APO/FPO and similar addresses with a US zipcode.
Sours: https://www.batteryjunction.com/suu2ulflu2.html

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Digital ultra surefire 2

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Surefire UDR Dominator 2400 Lumen Flashlight Extended Review

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