A black Wurkkos flashlight is lying horizontally on a wooden surface. The background is wooden with vertical slats. A ZeroAir logo is in the bottom left corner of the image.

Wurkkos TS27 LiFePO4 Flashlight Review

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Wurkkos TS27 LiFePO4 Flashlight Review

The Wurkkos TS27 LiFePO4 flashlight features a high-output front emitter as well as a lantern-style rear-facing set of emitters, which also offer RGB. Read on!

Official Specs and Features

Here’s a link to the Wurkkos TS27 LiFePO4 flashlight product page.

Versions

There’s just one version of the Wurkkos TS27 LiFePO4 flashlight.

Price

List price for the Wurkkos TS27 LiFePO4 flashlight is right around $100, but it’s available right now at 40% off.

What’s Included

A black Wurkkos flashlight, tripod, user manual, USB cable, wrist strap, and a white 5000mAh 21700 battery are arranged on a wooden surface. The ZeroAir logo is in the lower left corner.

  • Wurkkos TS27 LiFePO4 flashlight
  • Wurkkos 32140 cell
  • Lanyard
  • Charging cable
  • Spare o-rings
  • Tripod
  • Manual

Package and Manual

A green instruction card inside a box reads, “READ ME Make sure to remove the battery insulating paper disc before use,” with a line drawing of a flashlight and a small ZeroAir logo in the bottom left corner.

Black-and-white user manual for the Wurkkos TS27 flashlight shows product specs, ANSI/NEMA FL1 chart, technical and contact details on the left, and a diagram of operation instructions with labeled button functions on the right.

Build Quality and Disassembly

A black Wurkkos flashlight is lying horizontally on a wooden surface. The background is wooden with vertical slats. A ZeroAir logo is in the bottom left corner of the image.

The Wurkkos TS27 LiFePO4 flashlight is a big ol’ light! That’s fine, as it has a bunch of features. The build quality is very good.

Both the head and tail have very thick springs.

A close-up view of a flashlight with its tailcap removed, showing the internal spring mechanisms and circuit board on a wooden surface. A ZeroAir logo is visible in the lower left corner.

The cell tube is fully removable, but it’s not reversible. I’m not even sure the threads are the same, but there’s a “blank gap” at both ends that is not the same length, that prevents reversing.

A black cylindrical metal tube with spiral grooves lies horizontally on a wooden surface. Two unfocused round objects are in the background. A ZeroAir logo is in the bottom left corner.

Size and Comps

217.5 mm x 60mm and 305g (without battery)

Here’s the light in hand:

A hand holds a large black flashlight with a textured grip and a side button, positioned over wooden planks. The flashlight has Wurkkos branding and there is a ZeroAir logo in the bottom left corner.

Here’s the test light with the venerable Convoy S2+. The version below is a custom laser-engraved Convoy S2+ host by GadgetConnections.com. I did a full post on an engraved orange host right here! Or go straight to GadgetConnections.com to buy your Convoy S2+ now!

Also in the photo above, my Standard Reference Material (SRM) flashlight is the Hanko Machine Works Trident, an 18350 light. While I have not reviewed or tested the Gunner Grip version seen here, I have tested a Hanko Machine Works Trident Total Tesseract in brass. I love the Trident, and it’s a striking contrast to the inexpensive Convoy S2+, another great SRM.

Retention and Carry

A lanyard is included for the Wurkkos TS27 LiFePO4 flashlight. It’s a very simple wrist strap and attaches through a hole in the tailcap.

A black flashlight with a wrist strap is lying on a wooden surface. The end cap of the flashlight displays CE and RoHS markings. There is a “ZeroAir” logo in the corner of the image.

Also included separately from the light box itself is this tripod. I am not certain if this is an accessory purchase (I imagine it is). The tripod screws into a hole in the base.

A black flashlight with a textured grip stands upright on a small black tripod with red accents. The background is wooden with decorative cutouts, and a ZeroAir logo is visible in the bottom left corner.

If it’s extra, I wouldn’t pay much for it, but it’s pretty neat when used as a handle. It folds up reasonably small!

Power and Runtime

The Wurkkos TS27 LiFePO4 flashlight uses a 15000mah 32140 battery, which is, as the text implies, a LiFePO4 battery. This is different chemistry than we’re used to and has different characteristics.

A Wurkkos 15000mAh XH 32140 rechargeable battery is shown on a wooden surface, with a black flashlight blurred in the background and a ZeroAir logo in the lower left corner.

But the cell still goes into the light in the same way most cells go into most light – positive end toward the head.

A black flashlight lies on a wooden surface with its tail cap removed, exposing the battery compartment. A logo reading ZeroAir is visible in the bottom left corner of the image.

In case you forget that, you can check out this little printed icon on the (non-reversible) cell tube.

A close-up of the black body and head of a flashlight lying on a wooden surface, with a ZeroAir logo in the bottom left corner. The flashlight has a textured, grooved grip.

Below you can see a few runtimes for the front emitter and one for the rear emitters.

A line graph shows the runtime of the Wurkkos TS27 flashlight in various modes using a 15000mAh 32140 battery. Different colored lines represent Turbo, High, Medium, Low, and Lantern modes over time in minutes.

Graph showing the Wurkkos TS27 flashlights lumen output and temperature over time during a runtime test, with marked distances at key time points and an inset chart detailing the output curve.

A runtime graph for the Wurkkos TS27 flashlight using a 15000mAh 32140 battery. The plot shows light output (lumens) and temperature (°C) over 270 minutes, with annotations marking key lumens points at 542m, 533m, and 329m.

A performance chart for the Wurkkos TS27 flashlight shows output in lumens and temperature over time when using a 15000mAh 32140 battery, with runtime markers at 485m, 827m, and 1060m. Zero Air logo is present.

I don’t have a way to measure calibrated output for the lantern/reverse lights, so I just set the max to a relative 100, and you can see the profile from there.

A line graph shows the runtime performance of the Wurkkos TS27 lantern on turbo mode using a 15000mAh 32140 battery. Relative output and temperature are plotted over time in minutes, with a small inset graph showing short-term output.

The temperature lines in these charts are included as general context, not precise measurements. The values represent the range (min to max) during testing, but should not be taken as exact readings. A temperature sensor is not always attached to the bezel (or even the hottest spot, assuming that could be defined). Even with ideal placement, too many variables affect temperature to definitively state a specific max value.

Charging

The Wurkkos TS27 LiFePO4 flashlight has a USB-C charging port on the head.

A close-up view of a black flashlight lying on a wooden surface, showing a USB charging port covered by a rubber flap labeled USB. The flashlight model TS21 is visible on the side.

Wurkkos includes a USB-A to USB-C charging cable.

A black flashlight lies on a wooden surface with a USB charging cable placed in front of it. A ZeroAir logo is visible in the bottom left corner of the image.

Charging works fine from A to C and C to C, but if you have a PD source, the Wurkkos TS27 LiFePO4 flashlight will charge at 9V. That takes much less time than 5V (3h22m vs 4h11m).

Line graph titled Wurkkos TS27 Charging Log showing current (A) and capacity (Ah) over time for different cells, with colored lines and a legend in the center. A ZEROAIR logo overlays the upper middle section.

Note that the terminal voltage for this LiFePO4 is not 4.2V; it’s around 3.5V.

Powerbank

The Wurkkos TS27 LiFePO4 flashlight USB-C port can be used as a powerbank (or “reverse charging”), and with the large-capacity LiFePO4 battery, it should provide a reasonable amount of emergency charge!

Modes and Currents

Mode Mode Claimed Output (lm) Claimed Runtime Measured Lumens Tailcap Amps @ 3.5V
Turbo – Front 3200-1300 7m+3.67j 3080 (0s)
2872 (30s)		 4.65
Lowest – Front 5 300h – 0.02
Turbo – Side 1100-750 15m+4.67h – 4.38
Lowest – Side 3 300h – 0.02
– 60h – –

Pulse Width Modulation

In order below, these are spot twice, then flood twice. Flood is the only output that exhibits PWM.

Four oscilloscope screens display signal waveforms. The first two show flat lines, while the last two display increasing wave activity. Each screen features a Zeroair logo in the lower half.

Click here to see a “baseline” – a chart with almost no light hitting the sensor.

Then there’s the Ultrafire WF-602C flashlight, which has some of the worst PWM I’ve seen. It’s so bad that I used a post about it to explain PWM! Here are multiple timescales (10ms, 5ms, 2ms, 1ms, 0.5ms, 0.2ms) to make comparing this “worst” PWM light to the test light easier. That post also explains why I didn’t test the WF-602C at the usual 50us scale.

User Interface and Operation

The Wurkkos TS27 LiFePO4 flashlight has an e-switch for operation, but also a rotary selector around that e-switch. You select what output you want (front, rear white, rear RGB) and then the switch controls modes.

A hand is adjusting the control dial on a black flashlight resting on a wooden surface. The flashlight has a logo indicating it gets hot. A “ZerOair!” sticker is visible in the lower left corner.

A hand presses the button on a black flashlight resting on a wooden surface. The flashlight is positioned horizontally, and a “ZEROAIR” logo is visible in the lower left corner of the image.

The user interface really offers a lot, except for discrete levels. A flowchart details flashlight controls using toggle and side switches, covering functions for white, side, and RGB beams, including brightness, color, memory, strobe, and locking/unlocking operations.

The user interface is also fairly consistent between output types, which is appreciated. Note bottom right; there are a bunch of special modes, too.

LED and Beam

The Wurkkos TS27 LiFePO4 flashlight uses a Luminus SFT-70 emitter and a very smooth reflector.

Close-up view of a flashlight lens and LED bulb, photographed from the front and centered, with a wooden surface and blurred background. A ZeroAir logo is visible in the bottom left corner.

The beam profile is very throwy.

A flashlight is shining a bright beam of light onto a wooden surface, with the word ZEROAIR and a small logo visible on the lower left corner. The background consists of wooden planks.

The rear emitters are much more like a lantern. These offer variable CCT (“infinite” from warm white to cool white) and also RGB settings.

A flashlight is standing vertically on a wooden surface, photographed from the front with the lens facing the camera. A blurred wooden wall and a ZeroAir logo are visible in the background.

A black flashlight with a ring of small LED lights around the lens rests on a wooden surface. The flashlight is turned on, and the ZeroAir logo is visible in the bottom left corner.

LED Color Report (CRI and CCT)

[in progress]

CCT (Correlated Color Temperature) refers to the measurement of the color appearance of light, expressed in Kelvins (K), which indicates whether the light is warm (yellowish) or cool (bluish). A lower CCT (below 3000K) is considered warm light, while a higher CCT (above 5000K) gives cooler, bluish light.

CRI (Color Rendering Index) is a measure of how accurately a light source renders colors in comparison to natural sunlight. Scored on a scale from 0 to 100, higher CRI values indicate that colors appear more true to life and vibrant, similar to how they would look under the sun.

Beamshots

These beamshots always have the following settings:  f8, ISO100, 0.3s shutter, and manual 5000K exposure. These photos are taken at floor level, and the beam hits the ceiling around 9 feet away.

Tint vs BLF-348 (KillzoneFlashlights.com 219b version) (affiliate link)

I keep the test flashlight on the left and the BLF-348 reference flashlight on the right. These photos are taken around 18 inches from the door.

I compare everything to the KillzoneFlashlights.com 219b BLF-348 because it’s inexpensive and has the best tint!

Summary and Conclusion

The Wurkkos TS27 LiFePO4 flashlight is a neat light, for sure, and the unusual chemistry of the battery may have its own type of draw. The output from the front emitter is great (a bit under spec, but absolutely throwy). The lantern rear emitters are neat, too. I like the rotary output selector, but really wish there was more than just a ramping output option. I simply don’t love ramping enough for that. Anyway, the price is right, at around $60, for a light that doubles (triples? quadruples?) as a powerbank!

The Big Table

Wurkkos TS27 LiFePO4 flashlight
Emitter: Luminus SFT70
Price in USD at publication time: $59.99
Cell: 1×32140
Runtime Graphs
LVP? Yes
Switch Type: E-switch
Quiescent Current (mA): ?
On-Board Charging? Yes
Charge Port Type: USB-C
Charge Graph
Power off Charge Port
Claimed Lumens (lm) 3200
Measured Lumens (at 30s) 2872 (89.8% of claim)^
Candela per Lumen 57.1
Claimed Throw (m) 845
Candela (Calculated) in cd (at 30s) 5490lux @ 6.021m = 199026cd
Throw (Calculated) (m) 892.2 (105.6% of claim)^
Item provided for review by: Wurkkos
All my Wurkkos reviews!

^ Measurement disclaimer:  Testing flashlights is my hobby. I use hobbyist-level equipment for testing, including some I made myself. Try not to get buried in the details of manufacturer specifications versus measurements recorded here; A certain amount of difference (say, 10 or 15%) is perfectly reasonable.

What I like

  • Throwy beam
  • Reasonable cost
  • Unusual cell chemistry (has properties you may be interested in)
  • Rotary selector

What I don’t like

  • Ramping only
  • Cool white front emitter

Notes

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