[Review] SolarStorm T4 CREE XM-L U2 3×18650

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SolarStorm T4 CREE XM-L U2 3×18650

FreeDailyDeals Ratings:

fullstarfullstarfullstarfullstarnostar

Now: $29 (usual: $33.99)

 

Buy Now | Coupon: “ST4”

Store: Banggood.com

Arrival of Package

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Solarstorm T4 packed inside standard DHL packaging, wrapped with 2 layers bubble sheet to protect the box.

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 Flashlight well protected with foam padded brown corrugated box. Spare O-ring and lanyard are included.

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T4 unpacked from it packaging. Unit is in very good condition. No dents or scratches found at the exterior. Cannot wait to power up this baby.

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360 view of Solarstorm T4

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Manufacturer’s specifications.

Detail Views

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T4 has much deeper reflector than SPK. Slight mis-alignment for top left corner LED but it is not going to affect the output.

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T4 Driver (back)

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Thinner body diameter makes it much more comfortable to handheld, especially if you do not have a big hand like. Weight distribution is good and it feels really solid and grippy in hand. On the other hand, SPK/KUNG has rather sharp edges design on body tube which make it uncomfortable after long period of usage.

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Square thread was lightly lubricated when it arrived. Well position aggressive knurling pattern, facilitates break open process. Thick translucent o-ring prevent water or moisture from entering carrier.

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Nice gold plated springs.

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Tailcap looks “removable”, but definitely will be PITA as there is not much of a place to grip. I will leave it as it is for the moment.

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Battery carrier loaded with 3x 18650s.

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I was rather worry with the initial report, regarding it bluish tint for cool white. However, it turn out very usable in my opinion. There is not much of blue hue, it is more like 7000-7300k (close to XM-L2 1A) to me.

User Interface

HIGH (~0.5s) on single click. Press and hold for >1.8s to full turn on.

HIGH > MEDIUM > LOW,

Hidden Strobe with double click

SS-T4-brightness

Beam Profile

Projected from a distance of 50cm away from wall. You can see uqiue beam profile, comprise of 4 overlaying concentric beams of light. Edges of the spill will diminish rapidly when you move further and further away from the wall.

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Outdoor Shots

Partially lit pavement beside busy highway.

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Baseline

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Solarstorm T4 (HIGH)

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Modified XINTD X3 (~3.8A) (HIGH)
I have forgotten that I have removed the “addon” spring and unit no longer take flat-top cell. I end up using regular NCR18650A (protected) instead. This XINTD X3 is capable of 4.2A with high drain 18650.

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Measurement

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Recorded values from my DMM with 3x Panansonic NCR18650A 3100mAh Protected cells on HIGH (10sec).

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 Recorded values from my DMM with single Samsung INR18650-20R 2000mAh high drain cells on HIGH (5 sec, my DMM was push to limit).

Highest measured lux value is 2840lux at 3m, that translates to 25.56KCD. My lux meter is usually on the lower end. I will probably check the value again.

These are just some rough values then from my uncalibrated setup. This is to give a rough idea of what the flashlight is capable of. Actual values may vary.

 

Pulse-width modulation

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A quick wave of T4 in front of my DSLR with 5sec exposure (top). Example of PWM with SK68 at medium mode using same setup (bottom).

PWM-comparison

Side-by-side comparison with SK68. Screencap of video shot at 1/1250s shutter speed.
PWM is not observed from camera. Either freq is high or PWM is not present. I do not have an oscilloscope to test with.

Form factor

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Solarstorm T4 beside a soda can.

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Solarstorm T4 compared to few of my 26650 models. It looks really dwarf among them, yet so much power is packed in it.

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Solarstorm T4 – Pros and Cons

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Conclusion

Coming soon
~Need to use for longer period~

Now: $29 (usual: $33.99)

 

Buy Now | Coupon: “ST4”

Store: Banggood.com

== Many thanks to Aurabuy for making this review possible ==

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Comments (2)

Dank für das Teilen Sie diese Seite. Ich habe mehrere Kopien von Banggood in der Vergangenheit gekauft. Sie sind so gut wie Fasttech oder AliExpress Versionen. Erkannte, dass der Gutschein abgelaufen ist, aber ich werde meinen Anbieter kontaktieren, um bald wieder zu aktivieren.

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