Klarus XT Series Review: XT11S vs. XT11GT Flashlights

Last Updated on October 18, 2026

The tough and versatile Klarus XT11S flashlight is designed for law enforcement, security work, hunting, emergency response, and outdoor activities. Powered by a rechargeable 18650 battery, it delivers a maximum output of 1,100 lumens and a beam distance of up to 330 meters.

Despite its compact size, the XT11S offers several useful features, including three programmable operating settings, dual tactical tail switches, a separate side switch, and direct USB charging.

Its lowest brightness setting provides a manufacturer-rated runtime of up to 260 hours, making it useful for extended activities where conserving battery power matters.

In this Klarus XT11S review, we’ll examine its specifications, performance, advantages, and limitations. We’ll also compare it with the more powerful Klarus XT11GT to help you decide which flashlight is better suited to your needs in 2026.

For more models from the same manufacturer, explore our Klarus flashlight reviews and buying guide.

Klarus XT11S vs. XT11GT: Similarities and Differences

Both the Klarus XT11S and XT11GT belong to the company’s XT tactical flashlight family. They share several design features, including rechargeable batteries, multiple operating settings, and durable aluminum construction.

However, the XT11GT delivers greater maximum brightness and a longer rated beam distance.

Similarities

• Three selectable operating settings.
• Dual tactical tail switches and a side switch.
• Four regular brightness levels plus Strobe and SOS.
• Memory function for selected brightness settings.
• Electronic lockout function.
• Rechargeable lithium-ion battery support.
• Battery-level indicator.
• Intelligent Temperature Control System (ITS).
• Durable aluminum body.
• IPX8 water-resistance rating.
• Compatibility with certain optional tactical accessories.

Klarus XT11S vs. XT11GT Comparison Table

*Turbo runtime includes periods of reduced brightness. Flashlights do not necessarily maintain maximum output throughout the full rated runtime. XT11GT specifications can also differ between original and upgraded versions.

The XT11S is slightly smaller and lighter, while the original XT11GT offers substantially more lumens. However, maximum brightness doesn’t always translate into a longer beam distance. Reflector design and beam intensity also matter.

For a closer look at the more powerful model, see our Klarus XT11GT 2,000-lumen review.

Klarus XT11S Flashlight Technical Specifications

The XT11S uses a CREE XP-L HI V3 LED and an aircraft-grade aluminum body. It includes a smooth reflector for a focused beam and a toughened glass lens with an anti-reflective coating.

These ratings apply to the XT11S and are based on Klarus’s published specifications. Runtime results can vary with battery capacity, temperature, and operating conditions.

For the complete operating instructions, visit the official Klarus XT11S user manual.

Klarus XT11S Flashlight Video Review

Benefits of Using the Klarus XT11S LED Flashlight

The XT11S offers several features that make it convenient for professional work and outdoor activities.

1. Three Programmable Operating Settings

One of the biggest advantages of the XT11S is its three selectable operating settings. These change how the flashlight responds to its switches.

Classic Tactical Setting: The default setting provides quick access to Turbo and Strobe while retaining access to other brightness modes and the side-switch controls.

Outdoor Setting: Designed for regular outdoor use, this setting prioritizes instant high or low output without using Strobe through the tail switch.

Tactical Assault Setting: Restricts operation to Turbo and Strobe. The side switch is disabled in this setting.

This flexibility lets you choose the control layout that suits your activities.

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2. Durable Aluminum Construction

The XT11S uses 6061-T6 aluminum alloy with a Type III hard-anodized finish. This provides good resistance to everyday wear while keeping the flashlight relatively lightweight.

Its stainless steel bezel helps protect the front of the flashlight, while the textured body improves grip.

At 115 grams without the battery, the XT11S is light enough for regular carrying, although its larger head makes it bulkier than some compact EDC flashlights.

For another small Klarus option, check our Klarus Mi7 flashlight review.

3. Six Lighting Modes for Different Activities

The XT11S offers four regular brightness levels, along with Strobe and SOS.

*Turbo runtime includes automatic output adjustments as the flashlight heats up or battery voltage declines. Manufacturer testing used a 3,400mAh battery, so runtime may be shorter with the 2,600mAh battery supplied in certain packages.

4. Bright 1,100-Lumen Output

With a maximum output of 1,100 lumens and a beam distance of 330 meters, the XT11S delivers strong illumination for nighttime walks, outdoor inspections, and searching dark areas.

Its smooth reflector produces a focused beam that helps direct light farther than a broad floodlight.

However, maximum beam distance is an ANSI-rated measurement. It doesn’t mean you’ll necessarily recognize small objects clearly at 330 meters.

5. Convenient Three-Switch Interface

The XT11S has three physical switches: two at the tail cap and one on the side.

The dual-tail arrangement makes it easy to access important lighting functions with one hand, while the side switch supports brightness selection and other controls.

The side switch also includes a lockout function to reduce accidental activation during storage or transportation.

6. Intelligent Temperature Control System

Klarus includes its ITS temperature management system to monitor heat and regulate output when necessary.

This protects internal components during extended high-output use.

Keep in mind that thermal protection doesn’t make the flashlight completely cool to the touch. Its aluminum body can still become hot, especially in Turbo mode.

7. Convenient Micro-USB Rechargeability

The XT11S features a micro-USB charging port protected by a cover.

With a compatible protected 18650 rechargeable lithium-ion battery installed, you can charge the flashlight without removing the battery.

During charging, the side-switch indicator displays:

• Red: Charging in progress.
• Green: Charging complete.
• Flashing orange: Abnormal charging condition requiring inspection.

The charging circuit supports a maximum current of approximately 1,000mA. Charging time depends on battery capacity and the power source.

Important: Never attempt to recharge disposable CR123A batteries through the flashlight’s USB connection. Klarus also specifies that protected, compatible 18650 cells should be used for internal charging.

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If you’re interested in rechargeable flashlights using this battery format, see our comparison of 18650-powered flashlights.

8. Waterproof and Impact-Resistant Design

The XT11S has an IPX8 water-resistance rating, with Klarus specifying protection during immersion up to 2 meters under its testing conditions.

It also carries a 1-meter impact-resistance rating.

These features make it suitable for rainy weather and demanding outdoor use. However, the flashlight isn’t intended to replace a dedicated diving light.

Always keep the charging-port cover closed and inspect the O-rings for damage.

Shortcomings of the Klarus XT11S Flashlight

No flashlight is perfect, and the XT11S has some limitations worth considering before buying.

1. Older Micro-USB Charging Port

The XT11S uses micro-USB rather than USB-C. This can be inconvenient if most of your other devices use newer charging cables.

The port also needs proper care. Dirt, moisture, or repeated rough cable insertion can eventually interfere with charging.

2. Turbo Output Doesn’t Stay Constant

Although rated at 1,100 lumens, the XT11S may reduce brightness automatically to manage heat.

This is normal behavior for a high-output LED flashlight and should be considered when comparing runtime specifications.

3. Multiple Switches Require Familiarity

The three-switch design provides flexibility, but new users may need time to learn the available operating settings.

If you prefer a flashlight with simpler controls, a single-switch model may be more convenient.

4. Older Battery and Charging Design

The XT11S is based on an earlier generation of rechargeable flashlight technology. Newer Klarus models may offer USB-C charging, higher-capacity batteries, or improved output.

For example, our Klarus XT12GT and XT12GT Pro comparison covers larger long-range models with different charging arrangements.

How to Maintain the Klarus XT11S

Proper maintenance helps prevent charging problems, accidental shutdowns, and premature battery deterioration.

• Clean the contacts: Inspect accessible battery contacts and remove dirt carefully.
• Protect the charging port: Keep the cover securely closed after charging.
• Check O-rings: Replace worn or damaged seals using compatible parts.
• Use approved batteries: Follow the manufacturer’s voltage and battery protection requirements.
• Store properly: Keep the flashlight in a cool, dry place.
• Avoid prolonged heat: Allow the flashlight to cool after heavy Turbo use.
• Remove batteries for long-term storage: Follow Klarus’s storage recommendations.

If the flashlight stops working unexpectedly, begin by checking the battery, tail cap, and accessible electrical contacts.

Klarus XT11S Warranty and Support

The manufacturer’s XT11S documentation specifies a 5-year warranty against qualifying defects in materials and workmanship.

Accidental damage, unreasonable use, and unauthorized modifications are generally excluded.

For service, contact the original dealer or Klarus customer support with the product information and proof of purchase.

Warranty terms may vary by country and distributor.

Frequently Asked Questions About the Klarus XT11S

1. What is the maximum output of the Klarus XT11S flashlight?

The XT11S produces a maximum of 1,100 lumens using its CREE XP-L HI V3 LED. This output is suitable for outdoor activities, security work, and general nighttime illumination.

2. How far can the Klarus XT11S beam reach?

The manufacturer rates its maximum beam distance at 330 meters, with a peak intensity of 27,225 candela.

3. Is the Klarus XT11S rechargeable?

Yes. It features a built-in micro-USB charging port for charging a compatible protected 18650 lithium-ion battery.

4. What batteries does the XT11S use?

It supports one protected 18650 rechargeable lithium-ion battery or two CR123A primary lithium batteries. The manufacturer’s English manual specifically warns against using 16340 batteries. Disposable CR123A cells must not be recharged.

5. Is the Klarus XT11S waterproof?

The XT11S is rated IPX8 for immersion protection up to 2 meters under the manufacturer’s testing conditions. Check the charging-port cover and seals before using it in wet environments.

6. How long does the Klarus XT11S battery last?

The manufacturer rates the flashlight for up to 260 hours on its lowest 10-lumen setting. Actual runtime depends on battery capacity, operating mode, and environmental conditions.

7. Can I lock the Klarus XT11S to prevent accidental activation?

Yes. In supported operating settings, hold the side switch for approximately five seconds while the flashlight is off until it indicates lockout. To unlock, press the side switch three times quickly.

8. Does the Klarus XT11S include a warranty?

Yes. Klarus specifies a 5-year warranty against qualifying manufacturing defects, subject to the manufacturer’s conditions and applicable regional service arrangements.

Final Verdict: Is the Klarus XT11S Still Worth Buying in 2026?

The Klarus XT11S flashlight remains a capable option for buyers who want a compact rechargeable tactical light with strong brightness, practical controls, and durable construction.

Its 1,100-lumen maximum output, 330-meter rated beam distance, six lighting modes, and three selectable operating settings provide useful flexibility for a variety of activities.

However, its micro-USB charging system and older 18650-based design are worth considering, especially when newer flashlights offer USB-C charging and higher-capacity batteries.

Overall, this Klarus XT11S review shows that the XT11S still offers useful performance, particularly for users who appreciate dual-tail switches and programmable controls.

If you’re comparing alternatives, explore our tactical flashlight reviews and buying guides to find a model that matches your brightness, battery, and durability requirements.