JETBeam WL-S2 900 Lumen Flashlight Review

Some new lights have been added to the Jetbeam roster, using a “WL” prefix. In this post, I’ll examine the Jetbeam WL-S2 model which trumpets a 900 lumen output! Jetbeam WL-S2 Flashlight


The blue cardboard packaging holds the lights securely, and provides a very sturdy belt holster, in addition to a user manual, lanyard, spare switch-cap and o-rings.


With a CREE XM-L2 LED, and an orange peel reflector, the S2 produces a very clean beam. Throw is fairly good and is advertised at 260 meters (853 ft).

Lumen rating is at 900 on turbo mode. But Jetbeam claims that that is only possible when using two rechargeable 16340 batteries. With one 18650, they’ve rated it at 790 lumens. (More on batteries coming up.)

It’s just over 5″ long and weighs 3.6 ounces. It’s also waterproof to IP-X standards…I believe a submersion of 2 meters for 30 minutes was the test.

Its housing is a premium type III hard-anodized anti-abrasive finish, made from HA-III military hard-anodized aluminum alloy. Pretty indestructible.

CREE LED within WL-S2

CREE XM-L2 LED & orange peel reflector


Anywhere on the internet where you’ll see the WL-S2 for sale, you’ll read within the specifications that it accepts ALL (most common) battery types! And by this I mean;

  • (1) 18650 [rechargeable]
  • (1) 16340 [rechargeable]
  • (1) CR123 [disposable]
  • (1) AA!! [disposable]
  • (2) 16340*
  • (2) CR123

*** The following paragraph has an update following the review***

This is misleading, and left me scratching my head in disbelief. The length of the tube on the S2 is standard for a 18650 light. So I thought…there’s no way it could utilize ONE smaller battery unless they included an extra (smaller) tube within the package. They don’t. So within these descriptions, Jetbeam references “DIY” and “S1” tube kits! Now YOU’RE probably saying…huh? (I was too)

Within the WL family, there’s also an S1 version. The S1 is slightly shorter than the S2. 109mm compared to 145mm. It uses a smaller battery tube. It claims to operate on basically the same battery configurations. But in truth, it only does by way of swapping the tube from the S2. So from this, all I can surmise, is that Jetbeam “suggests” the customer purchase both lights. Owning both permits the heads, tubes and tail caps to be interchangeable. This also allows other (singular) battery types to be used….including standard AA’s. The S1 as sold, is meant to accommodate only ONE 16340 (or CR123) or ONE AA or ONE rechargeable 14500. As I say, these claims (at first glance) are quite misleading and require a clear explanation.

*** Please see the update to this scenario following the review***

As I mentioned, none of this is explained on the packaging, or within their literature. And for many consumers this could be an unfortunate surprise. I like Jetbeam products and if you’re new to their name, don’t think that this sort of chicanery is typical of them.

* The WL-S2 is heavy on amps. In recent tests on Turbo mode using two 16340 rechargeable cells, a draw of about 2.5 amps was measured. This is a bit of a strain on this type of battery. Although it allows the light to shine bright, it can result in less run-time, and perhaps quicker degradation of the cells. For a two-cell configuration, a better recommendation might be to use two “IMR” 16340 batteries. Similarly you can also use two IMR 18350 batteries.


Pictured, is the “mode” switch. Once the tail cap is pressed and the light is on, the mode switched is used to change illumination levels. Most LED lights tend to cycle from low to high. In the case of the WL-S2, it cycles from turbo to low. Personally, I find this a bit more difficult getting used to. The modes are as follows;

  • Turbo
  • High
  • Medium
  • Low
  • Moonlight
  • Strobe*
  • SOS*

*Strobe and SOS are accessed by holding the mode switch while already in one of the regular modes. One quick press returns to the previous mode.

The mode switch covers two functions. The switching as described above is its main function, but it also serves as a power indicator.

As soon as the light is activated, the mode switch glows for 5 seconds. The illumination

Mode Switch on WL-S2

Battery (power) indicator on WL-S2

portion is divided into two sides. If the battery you’ve inserted is full, it will display a “full glow” (as pictured). As the battery drops below 50% voltage, the LEFT SIDE of the mode switch will blink. I’m uncertain as to how low it must go before the next stage, but as a warning that the battery must be charged soon, the left side will cease blinking, and the RIGHT side will take the blinking to the next level.


(click each image to view full-size)

indoors on moonlight - WL-S2

moonlight – indoors

low mode indoors

low mode indoors

medium mode indoors

medium mode indoors

high mode indoors

high mode indoors

turbo mode indoors

turbo mode indoors

low -outdoors- @12ft

low -outdoors- @12ft

medium -outdoors- @12ft

medium -outdoors- @12ft

turbo -outdoors- @12 ft

turbo -outdoors- @12 ft

medium -outdoors- @75 ft

medium -outdoors- @75 ft

turbo -outdoors- @75 ft

turbo -outdoors- @75 ft
















Don’t hesitate to make yourself known should you have questions about the Jetbeam WL-S2. I’m here to help.





Since writing the paragraph above, regarding Jetbeam’s description of the S2 and its somewhat deceitful battery configurations, I have since obtained the WL-S1 tube and tail cap. This, as per Jetbeam’s description, is what transforms the larger S2 into the smaller S1! This now makes perfect sense out of what Jetbeam was referring to…regarding the “DIY” configuration.

Here are some photos to illustrate what I’m talking about. Please note that a pocket clip comes pre-attached to the tail cap.

Here are the two sections when separated.

Jetbeam WL-S1 tube/tail cap

The WL-S1 tube and cap (separated)


What you see in the next two photos are the two sections of the S1 tightened together. Once together, they replace the original S2 tube and cap.

It actually attaches in two stages. The first stage (shown as “loosely tightened”)  is to accommodate a AA-size battery. This also includes either an NiMH, or Lithium-ion 14500 rechargeable battery. The second stage (fully tightened) allows you to use a single CR123 or rechargeable 16340 battery.

The two sections; tightened

The two sections; loosely tightened

S1 tube & tail fully tightened

S1 tube & tail fully tightened






The next photo depicts the WL-S2 with the S1 tube and cap attached (and fully tightened) which now makes the entire length of the flashlight, a mere 4.25″ long.

Jetbeam WL-S2 with WL-S1 tube & tailcap

WL-S2 with WL-S1 tube and cap attachment


So, with the WL-S1 tube and tail cap attached, you now have a more compact flashlight with the exact same functionality as before, but that can be used with a smaller battery!

With the included clip screwed to the cap, this allows the light to sit deeper into your pocket, than with the original cap attachment.

The new configuration also allows the S2 to be used with a AA battery…either rechargeable or disposable. Just be aware that using anything other than a lithium 3.7 volt battery, will result in a much DIMMER light.

So, based upon Turbo Mode, here is what Jetbeam says you can expect when using different types of batteries along with the shorter tube and cap;


  • (1) 16340 or 14500 rechargeable… 770 lumens
  • (1) CR123 … 290 lumens
  • (1) AA (alkaline/NiMH) … 165 lumens

So, it’s your choice whether you desire the WL-S2 to be used “as is” or with the additional S1 tube and cap, thus combining the TWO flashlight models into ONE!



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  1. Wow! I like the feature where the WL-S2 tells you how full the batteries are. How often does it occur that we have a flashlight that we want to use and all of a sudden, the battery is dead and we can’t see it in advance.

  2. Looks like quite a powerful little thing! Great review!

  3. Great info here! I would like to know some price comparisons though.

    • Yes, and that’s what online shopping is all about. For obvious reasons I don’t discuss cost…but I can tell you right now (cyber Monday) that it’s around $40.

  4. Wow, that turbo setting really is bright. This flashlight seems to hold a lot of power. Thanks for sharing this info.

  5. Wow, you can change so many illumination levels with a flashlight?
    Sounds really cool!
    I love the power indicator function too.

  6. @BR Wilkie – thanks for this review, I am no longer confused.
    I was considering purchasing the WL-S1 earlier and could not work out how all the different batteries would fit so I did a little googling and found your review.
    It all makes sense now – buy two different lights and swap tubes – of course!!!
    Jetbeam have just been added to my ‘never to purchase’ list – underhanded bar-stewards!

    • Thanks for “Googling me”.

      In response to more than a few complaints, I’ve had been told that JetBeam is planning a separate release of the extender tube, which would make the S2 compatible with the other batteries. I’m still waiting for that to happen. I’ll certainly announce it when it does.

      Your frustration is understandable, but I wouldn’t write them off JUST yet!

  7. Excellent review. I have a question, do you use/recommend protected or unprotected rechargeable batteries in this type of flashlight? Thanks.
    Best regards,

    • Thanks for writing Mick! Basically, it’s your choice. It depends what you prefer. With the WL-S2 however, there is a caveat to my response. If you acquired this light along with the additional tube, to make it a single 16340/18350 light, then you can use an unprotected IMR 18350. My choice for whenever I use an 18650 battery, is ALWAYS to use one that is protected.

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