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Thread: [Review] Astrolux S42 4xNichia 219C Rechargeable LED Flashlight supplied by Banggood

  1. #1
    Flashaholic Lexel's Avatar
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    Default [Review] Astrolux S42 4xNichia 219C Rechargeable LED Flashlight supplied by Banggood

    The light was supplied by Banggood, no compensation other than the light itself was received for this review



    3The price can be lowered to 25.95$ with Mad Max coupon here


    This is my 3. light that was supplied by Banggood for a review, I am honest and will judge the light as it is with its pros and cons


    Specification:

    Product name: Astrolux S42 2023LM Rechargeable Mini LED Flashlight
    Brand: Astrolux
    Model: S42
    Emitter Type: XP-G2,XP-G3, Nicha 219C
    Light Temperature: XP-G2(6500K),XP-G3 (6000-7000K),219C(5000K)
    Light Color: Cool white,Cool white,Warm white
    Material: Aluminum alloy
    Total Emitters: 4X
    Mode: Group1:Moon,Low,Med1,Med2,High1,High2,Turbo
    +Moon,Turbo,Tactical strobe,Battery check,Bike flasher (without memory function,short press<0.5s)
    Group2:Low,Med2,High1,High2 (with memory function,duble click the button,short press<0.5s)
    Lumens: 2lm,20lm,140lm,240lm,545lm,735lm,2023lm (XP-G3)
    1lm,17lm,125lm,220lm,490lm,650lm,1740lm (XP-G2)
    1lm,16lm,125lm,210lm,475lm,630lm,1630lm (Nichia 219C)
    Runtime: 2.9D,1.3D,6h,2h,1h,0.4h,0.39h (18350)
    14D,6.4D,29h,9.7h,4.8h,2h,1.99h (18650)
    Battery Configurations: 1 x unproteced plate head 18350/16340/18650 battery (not included)
    Working Volatge: 2.8v-4.25v
    Switch Type: Clicky
    Switch Location: Body side of the flashlight
    Peak Beam Intensity: 19850cd
    Impact Resistant 1.5 meters
    Max Output: 2023lumens
    Waterproof: IPX-65 waterproof
    Body Color: Black
    Weight: 60g (without battery)
    Size: 77mm x 27mm (length x head diameter) (18350 size)
    102mm x 27mm(length x head diameter) (18650 size)


    There is an error in the original specs the Nichia are neutral white, while they are described as warm white



    for more manufactory product pictures go to Banggood



    the parcel arrived after 36 days shipping with to Germany which is acceptable from China.



    Package and content:



    The light came packed well with a plenty wrap around and in a plastic bag



    The light comes in a card box which is typical for Astrolux


    The box has a compartment for the light and a battery, but the battery compartment has 14500 size while it is a 18350/18650 light


    It comes with 2 spare o-rings, clip, lanyard, spike, thread adapter and manual




    Here you can see the optional 18650 tube with clip attached, compared to an Utorch UT01, which looks quite familiar as this light





    Photos of the light









    Comparism and teardown:




    Size compared to other 18350 and 14500 lights


    I would have dropped the thread for the spike in the tail cap to get the light shorter



    compared to 18650 lights


    there is a 18650 aluminum tube available, but it is as well too short for button top or protected batteries, probably a longer 18650 will be released soon for the S42



    Beam color is neutral around 5000K for the Nichia 219C model, the Nichia has a nice uniform beam and color rendering is great



    The LEDs are perfectly reflowed and the MCPCB sits perfect, but the charging port cover slips too easily




    from left to right the lights get warmer, picture taken @5000K camera setting

    left XML2 U3-3D 5000K, Astrolux S42 Nichia 219C 5000K, Nichia 5700K, XPL HD 1A 6500K

    The LEDs in this light are available in XP-G2, XP-G3 and Nichia 219C



    The light can be taken apart completely, nothing is glued


    The light has the tail cap with a thread for the spike or an tripod



    The head has a diameter of 27mm and 21mm visible of the TIR optic


    The driver canít be pulled out easily, the LED leads have to be unsoldered
    I highly recommend unsoldering the side switch board as well
    then push the driver out through the LED wire hole



    The driver board has 2 pads for AMC7135 chips which are not populated




    So a single FET is controlling all modes




    the leads are all reinforced with some glue





    The threads are triangular cut, good quality but square cut would be nicer


    The light can be physical locked out by twisting the tail cap or head


    The Head



    the TIR is a medium flood, gives a nice uniform beam with some spill




    the Nichia LEDs fit in nicely




    The slave board for the switch has also a green and red LED



    The shelf is about 1mm thick, it could be more, but the thick copper MCPCB does a good job spreading the heat, on Turbo the head gets hot really quick, so the thermal path is well



    Waterproofness might be an issue as the USB cover gets very easy loose, they should have made the cut out 1mm deeper like the Klarus lights and have the rubber cover with o-ring like shape
    Banggood does provide a new designed USB cover






    The thermal paste was applied in a moderate quantity and seems to be some silver compound, when I removed the MCPCB I saw a really nice pattern which means it was on the full surface and in a thin layer



    The MCPCB is s true copper DTP one about 1.5mm thick, very nice, the back of it is gold plated
    The MCPCBs back is perfectly flat



    The lens is AR coated glass


    I would like to see the TIR attached to the lens with optical glue to get more OTF lumens


    Tube and Tail




    Tail cap spring is thick and seems to be some alloy which is barely magnetic possible stainless steel, also the driver one is barely magnetic


    I cut the tail spring a bit shorter as my unprotected brass button cell get dented in the tail, when fully screwing the tail down, even with raised top cells like Sanyo 18650GA itís a tight fit


    The light is build for unprotected batteries, protected or button top unprotected wonít fit
    from those batteries only the 2 left fit without a problem, with the S41 tube



    the tube inner diameter is 19mm, the springs get fully compressed with an unprotected flat top cell, so their resistance is very low, the tail spring sticks a bit over 1mm inside the tube




    The tube threads are triangular cut on both sides, the tube has 2 o-rings and the tail side is lubed for water tightness




    Driver and Battery




    The light is USB chargeable with micro USB connector



    The Light charges the battery with 0.5A
    the cell reaches fully charged 4.16V, this is a safe and good value



    The light has PWM in moon and medium/high modes, but itís really fast about 100kHz hard to photograph



    The lights runs 20 seconds on highest level, I canít see a significant drop in brightness during that time but the head gets hot really quick from 25įC to about 60įC, then it ramps down slowly to High2, no hard step down so smooth you did not even notice


    The light has not much mass to absorb heat, in turbo mode on a high drain cell it gets hot quickly, in High2 the temperature stabilizes on a good level if held in hand


    Tail cap current measurement on brightest level

    stock light:
    - 6.1A with 5 year old Samsung 18650-26F
    - 9.95A with new Samsung 18650-30Q
    - 8.90A with new Sanyo 18650GA

    Tail current for other modes
    Moon 6.9mA
    Low 79.5mA
    Middle1 0.6A
    Middle2 1A
    High1 1.47A
    High2 2.12A

    The mode spacing is too close together for my liking, the moonlight could be lower like a firefly using those unpopulated AMC pads on the driver


    At 2.78V the light does step down to firefly mode and blinks low voltage warning
    if the battery voltage recovers you may enter low and middle1
    Below that voltage it shuts down and you cant turn on the light again



    The light pulls in the breathing mode 0.95-1mA from the battery
    Unfortunately the breathing mode runs down to 2.38V which is too low, and will damage the battery


    When the light is locked out with side switch it pulls about 15uA



    Modding:


    nothing really to do here, the light is already really good


    I did just cut the tail spring a bit shorter to allow my brass button flat tops to fit without denting the battery bottom,
    there will be longer tubes released soon



    Beam shots




    about 2m from Light to ceiling

    Astrolux S42 Nichia 219C



    Astrolux K01 XPL-HD 3D



    Jetbeam Jet-1 MK modded with Nichia 219C from a BLF348-2016



    Utorch UT01 6500K



    Nitecore P12 XML U3-3D NW




    User Interface




    I donít like how long it takes pressing the button to shut the light off, my Utorch UT1 is a lot quicker, also when in moon mode a long click goes to turbo instead shutting the light down, which may ruin your night vision


    I like the user interface of the UT01 more than the one in this light


    The double click to switch mode groups is wasted, better do instant turbo from any mode and off with it and switch modegroups differently


    Conclusion




    Positive:
    - good production quality
    - solid head, DTP star screwed on the shelf
    - Nichia LEDs has a nice neutral white with great color rendering
    - AR coated glass lens
    - good floody beam, but also some throw by the amount of light on turbo

    Neutral:
    - does only fit unprotected flat top batteries, unprotected button top wonít fit, this fits the product specs, but this is going to be changed
    - triangular cut threads, square cut would be nicer
    - the UI is not really good
    - S41 18650 tube fits only unprotected flat top batteries


    Negative:
    - waterproofness might be an issue as the USB cover gets very easy loose, they should have made the cut out 1mm deeper like the Klarus Lights and have the rubber cover with o-ring like shape, this is going to be changed
    - the low voltage protection in breathing mode the light runs the battery way down too much to 2.38V
    Last edited by Lexel; 06-19-2017 at 04:28 AM.

  2. #2
    ven's Avatar
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    Default Re: [Review] Astrolux S42 4xNichia 219C Rechargeable LED Flashlight supplied by Bangg

    Great detailed review, thanks for sharing Bang for buck it is a very hard light to beat, even with the few short comings.

  3. #3

    Default Re: [Review] Astrolux S42 4xNichia 219C Rechargeable LED Flashlight supplied by Bangg

    Thanks for doing this review, very informative.

  4. #4

    Default Re: [Review] Astrolux S42 4xNichia 219C Rechargeable LED Flashlight supplied by Bangg

    Thanks for the review Lexel.

    The Manker E14-II was melting Hot in Turbo in lesser than 1 minute, is the Astrolux S42 the same?
    From your beam shots pictures, it looks like the S42's is more focused (which I personally prefer). Do you see "ears" from the beam?

  5. #5
    Flashaholic Lexel's Avatar
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    Default Re: [Review] Astrolux S42 4xNichia 219C Rechargeable LED Flashlight supplied by Bangg

    The light pulls 10A from a fresh battery, of course it gets hot
    I measured 63įC after the light slowly reached high2

    The top temperature after stepping down and let the light run for 10 minuted ceiling bounce was a bit below 80įC, which is a safe level

    driver replacing without keeping the chargin circuit is easy, a 21mm driver fits with minor sanding


    with AWG18 and SIR800 FET pulling 18.9A on cold start
    instead the 9.95A with fresh Samsung 18650-30Q cell


    I did come out with a solution I like keeping the old drivers slave board electronics

    I did wire the old electronics with the LED+ wire on the star, so if I want deactivate the USB charger and breathing lighted sideswitch to get rid of the parasitic drain,
    I can unsolder the thin wire on the star


    The drivers contact board and TA 21mm LDO driver


    trimed the board to fit easily



    used my Dremel to get rid of unsoldering the leads to the switch board



    trimmed the old driver contact board to fit inside the head, cut the bolts connecting both boards by 4mm and sanded it



    Driver assembly before gluing the old board on top of the TA driver to fix the position USB slave board
    I had to cut the USB opening a bit as I trimmed not enough leng of the bolts



    The lead connecting the old slave board with the battery, can be easily disconnected

  6. #6

    Default Re: [Review] Astrolux S42 4xNichia 219C Rechargeable LED Flashlight supplied by Bangg

    Quote Originally Posted by Lexel View Post
    with AWG18 and SIR800 FET pulling 18.9A on cold start
    instead the 9.95A with fresh Samsung 18650-30Q cell
    Wow 18.9A, very nice !!

  7. #7

    Default Re: [Review] Astrolux S42 4xNichia 219C Rechargeable LED Flashlight supplied by Bangg

    Quote Originally Posted by proceed5 View Post
    Wow 18.9A, very nice !!
    I replaced the driver spring with a brass button and got 10.7A. I couldn't hold the flashlight after 10 seconds on turbo...can't imagine with 18.9A!

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