Sharmman
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Sharmman 31/01/2023
Nice medium beam flashlight with 21700 Li-Ion , that absorbs 7A+ with a high current 21700 Li-Ion and provides 390 KCd beam (1250m) and close to 2400 Lumen , almost close to 2mm² OSRAM KW CSLPM1.TG in the same reflector , but double Lumens of SFT-40 also provide 2 intensive side spills that are useful for closer targets. Highly recommended as a strong medium size searching flashlight.
Convoy L21B SFT40 2000LM 6500K Strong 21700 Flashlight Lightweight Long Range 12 Groups Modes With Memory Function LED Torch Lamp
US$49.49 US$63.99
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Sharmman 23/11/2023
The best oscilloscope that money can buy , compared to over 300$ Pro tools. All features are 100% true and accurate and received with EU plug 2A charger. - Tested in real world with HF & VHF devices and not with easy RF generators ( Photos ) - Real 2 X up to 200 MHz bandwidth channels. - 5nS time base per channel and you can clearly watch any waveform up to 180MHz. - Many functions to analyse signal even with spectrum analyzer for HF < 20MHz - Very accurate in voltage / time / frequency illustrations. - You can easily remark any Kind of periodical waveform if you use the suitable trigger settings. - Clever panels button lay out for easy access of important parameters. - In current firmware you can save and preserve all edited parameters as default in every restart. - Over 4 hours of full working with Li-Ion battery. - Be sure to use x10 voltage per channel due to work properly and safe for over-voltages and use X1 on probes for magnifying temporary low signals. Highly recommended as a professional pocket oscilloscope.
FNIRSI DPOX180H Handheld Phosphor Digital Oscilloscope 180MHz -3DB 50000wfms/s Dual Channel 20Mhz Signal Generator ZOOM XY FFT
US$130.99 US$199.99
3
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Comments (1)
Sharmman 02/02/2022
-- SST-40 version 5000K -- Measured 8,6A max using the highest drain 21700 Samsung 30T (2,15A per SST-40) and found 4000Lm max with 44KCd at cold start and 9° flood angle (Note that 7000Lm require at least 16A current draw of 4 x SST-40 in parallel). If a single SFT-40 & reflector had been used at same current flashlight would had exceed 150KCd. 7135+direct mosfet (WMB023N03 of 4mR RDs(on)) topology is used with TP5100 2A buck USB charger controller that define it as 4000Lm flood EDC flashlight for your walk but nothing close to what vendor advertise that's why it get 4 stars.
Astrolux® EA01S 4*XHP50.2/SST40 11000LM 500M USB-C Rechargeable Anduril UI EDC Flashlight High Lumen Powerful Mini LED Torch 26650/21700/18650/26350
US$66.95 US$78.00
7
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Comments (1)
Sharmman 12/05/2022
Blue Lake LEP module with good optics , highly biased at over 15W at turbo that emits 2.089.000 Cd max (8m ANSI 32,600 Lux measurement) and covers 2.890m distance with sufficient white color tint. (Low=544KCd & 1,25A and High=1.478KCd and 3,6A) It consumes at turbo (double click) 4,6A & 4V with decent heat dissipation for its power. 18W dual mosfet (FDS9926/NCE4963) step up driver at 4,3V with constant current regulator (OC6701) that works at high and turbo while Low is controlled by LF PWM of pic controller that can be captured by any digital camera and is the only flaw ! Internal 3A USB-C fast charger using SLM6600 for charging the attached 21700 Li-Ion battery and any high capacitance Li-Ion can be used for this < 5A current flow LEP. Almost identical in beam range with Xsword LA10 and highly recommended for this price.
Astrolux® WP3 2.9KM 562LM Long Distance Throwing LEP Flashlight Strong Spotlight Waterproof Search Flashlight With 28A High Drain 21700 Li-ion Battery
US$160.48 US$306.00
16
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Comments (1)
Sharmman 27/10/2023
Very useful and accurate meter , wi-fi is the best version with many protections parameters that can be manually set and also memorizes any state if disconnected from mains , if enabled from main menu.
WIFI Digital Wattmeter EU Plug 220V AC Power Meter Electricy consumption Energy Meter Power Kilowatt Wattage Electricity Meter
US$19.99 US$29.99
3
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Comments (0)
Sharmman 31/05/2019
Although this flashlight is stated as 2400Lm and 190Kcd , this latest SST-40 has very low Vfd and the cheap method that driver works in turbo mode where low RDSon mosfet is DC connecting led directly to battery , can be fatal for Led's life ! Using a real 20A discharge 26650 Li-Ion battery and as expected in turbo mode led's current was over 9A at real 4V of battery , led's luminance was about 3000 Lumen and intensity close to 220 Kcd ! I strongly suggest for Led's safety to use either a 26650 Li-Ion with 6-7 amperes current protection nor one with lower discharge current like KeepPower 5200mAh , since 9A can easily burn Led's internal wiring. Summary , without concerning about Led's risk , this is the strongest single 3,7 Li-Ion factory thrower !
Astrolux® FT03 SFT40 2200lm 1200m SST40 2400lm 875m NarsilM v1.3 USB-C Rechargeable 2A 26650 21700 18650 LED Flashlight Long Range Strong Search Torch
US$56.99 US$77.44
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Recommendations
Comments (5)
Sharmman 24/09/2021
I calculated max zoom options using a copper wire of 0.59mm dia and min distance from object 10mm where is focus limit. At max analog zoom dimension of wire dia was 48mm with no distortion at HD resolution and result is 81,5 max analog zoom. Max digital zoom was measured around 180 but it distorts object's aspect ratio so it's not advised. Excellent for soldering SMD parts with 12-15 zoom in at 7cm distance between object & microscope head where leds illumination is sufficient with approx 10 degrees declination from vertical axe with +1 resolution. Just shave less than a 1mm of bottom surface of m-USB connector or use another one thicker and also resolution and screen are just fine and works flawlessly. In headlines a descent up to 80 analog zoom camera/magnifier using 7 inch screen , highly recommended for working with SMD parts and micro machines but nothing to do with a real microscope of declared 1200 magnification that's why it gets 4 stars.
MUSTOOL G1200 Digital Microscope 12MP 7 Inch Large Color Screen Large Base LCD Display 1-1200X Continuous Amplification Magnifier with Aluminum Alloy Stand Power Supply Version
US$67.99 US$93.99
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Comments (2)
Sharmman 19/01/2021
A real 150W SBT90.2 thrower that was measured 19.3A at 8.4V. Driver works at 2SX2 Li-Ion 8.4V using 3 parallel buck drivers topology of 13A output each that provides SBT90.2 almost 40A at its over-current limits and the only flashlight at this size with single SBT90.2 that can really exceed 7800 Lumen at cold start. Max beam light density at 5m was measured around 670Kcd (at 10m maybe closer to 750KCd ) therefore can't be beaten by any flooder ≥ 2.6° beam angle thrower flashlight. 4 X 18650 Li-Ion batteries of real 20A discharge current are required to see above max Lumen and 700KCd.
Astrolux® MF02S V2 SBT90.2 6500LM 1732m Long Throw Strong LED Flashlight Short Body Tube 4x 18650 Powerful Searching Light
US$239.95 US$299.94
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Comments (16)
Sharmman 31/10/2022
An 6° central beam flood flashlight with wide spill , around 8000 Lm max and 64KCd with a 26650 Li-Ion of 20A discharge current , with Tiny85 controller , TP5100 2A USB-C charger and direct Sir800 mosfet driver of 2mR RDS(on) for turbo mode. It can exceed 10.000 Lumen if tail cap spring is bypassed by AWG18 cable and only using Samsung 21700-30T Li-Ion at around 32 A , that only this battery can provide at 3.8V.
Astrolux® FT02S 4* XHP50.2 11000LM 639m Ultrabright Anduril UI Strong Flashlight Long Throw 18650/21700/26650 Powerful LED Torch
US$69.95 US$89.00
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Comments (0)
Sharmman 16/06/2021
Batteries max current was measured at 19A and close to 6000 Lm if led has an average flux bin. It's a floody thrower of 5° beam angle with rich spill , around 280KCd and max beam distance 1058m. Driver has simple current limiter and dimming use no-PWM lossy topology (rectifying LF PWM) that's why 4 X Vishay SIR series mosfet are used in parallel to adsorb voltage drop in lower power dimming. It has a real 3A USB-C charger slot (2,5A at 5,1V) , long operating time (12.000mAh) and >15A discharge 18650 must be used for max Lumens operation. Highly recommended at this price !
Convoy 4X18A SBT90.2 5400LM 1122M Strong LED Flashlight TYPE-C Rechargeable 18650 Tactical Torch Super Bright Hunting Riding Night Fishing Lamp
US$81.00 US$99.99
16
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Comments (5)
Sharmman 27/11/2020
It's the strongest close to 1° beam angle thrower that you can ever get in such size and the only cons is the greenish color tint that can seen over 100 meters , but don't really matter for a far shooting thrower. 12W Step-Up topology driver with current limiter at 3A that feeds Blue Laser Led that emits on phosphor layer , at constant 4,1V with initial pre-heating PWM and can fully drive Laser Led up to 60% of battery capacity. This flashlight (LEP) can not be measured under 8 meters , so according to ANSI standards at 8m distance I managed to capture 28.500 Lux that are translated to 1.814.000 Cd and 2701m beam distance , kudos to Weltool team that published real specs of this top-range flashlight , that is highly recommended !
Weltool W4 Pro 568lm 3394m Super Throw LEP Flashlight Long Distance Thrower Tactical Strong Spotlight Waterproof 21700 LEP Torch Search Light
US$445.00 US$499.99
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Comments (3)
Sharmman 09/03/2022
Using an 21700 T40 battery , current draw was measured at 6.3A that provides 1750 Lumen max at this Led's flux bin. CULPM1.TG of 2mm² emitting area was a good choice (while CULNM1.TG would be the best) for enhancing beam angle and light density that was measured around 52.000 Cd / 450m , almost impossible for any 5050/7070 Led of triple power to reach in such a small reflector of 27mm dia. A good EDC pocket flashlight that combines good local view and throwing for this pocket size.
CONVOY S21B with KW CULPM1.TG 6A Driver Strong LED Flashlight 12 Groups 21700 Version Torch Flash Light
US$43.34 US$47.99
5
Recommendations
Comments (0)
Sharmman 07/11/2019
As described in all specification , but the main issue for me is that body tube's diameter for 21700 battery is smaller than the average width dimension of 21700 batteries , not even an 21700 to 18650 battery adapter can fit in tube , only Samsung 30T was able to fit there , that's why it gets 4 of 5 stars !
Convoy M21A SST40 2300lm 6500K 21700 18650 Flashlight White Tint LED Torch
US$43.24 US$47.99
6
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Comments (1)

Sharmman@balong5386 Don'texpect above 1 minute !

Sharmman 16/06/2021
Batteries max current was measured at 19A and close to 6000 Lm if led has an average flux bin. It's a floody thrower of 5° beam angle with rich spill , around 280KCd and max beam distance 1058m. Driver has simple current limiter and dimming use no-PWM lossy topology (rectifying LF PWM) that's why 4 X Vishay SIR series mosfet are used in parallel to adsorb voltage drop in lower power dimming. It has a real 3A USB-C charger slot (2,5A at 5,1V) , long operating time (12.000mAh) and >15A discharge 18650 must be used for max Lumens operation. Highly recommended at this price !
Convoy 4X18A SBT90.2 5400LM 1122M Strong LED Flashlight TYPE-C Rechargeable 18650 Tactical Torch Super Bright Hunting Riding Night Fishing Lamp
US$81.00 US$99.99
16
Comments (5)
DM Type-C & USB3.2 Gen1 Flash Drive Dual Interface Solid State Storage Flash Disk 128G 256G 512G 360° Rotation Thumb Drive
US$33.99

Q: What are the measured data transfer rates (read, write)? Screenshot welcome.

Asked by petermolnair on 2022-01-19 02:41:35

Sharmman Sorry but totally inaccurate , speed of transferring a monolithic file like video of 2-10Gb was only 42Mb per Sec !

2022-05-17 09:45:23 Helpful (0)
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Answers (2)
Sharmman 27/04/2022
AC clamp meter function is very accurate and has all required functions including peak hold. Capacitance meter was tested from 10pF up to 3,3mF and found very accurate especially under 1nF where many other fail. Frequency meter works fine and is accurate only at square waveform from 5Hz up to 500 KHz , tested with 5V p-p input signal. Very accurate at low-medium DC current from 0.5A and very useful at daily lab-work (see attached pictures) , tested from 0.5A up to 100A constant current , all other functions are as described and accurate but the missing peak hold at DC clamp meter is very important that's why it gets 4 stars. Strongly recommended for that price !
ANENG ST206 Digital Multimeter Clamp Meter 6000 Counts True RMS Amp DC/AC Current Clamp Tester Meters Voltmeter
US$33.34 US$43.99
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ANENG ST206 Digital Multimeter Clamp Meter 6000 Counts True RMS Amp DC/AC Current Clamp Tester Meters Voltmeter
US$33.34 US$43.99

Q: Can clamp meter read the current in mA? whats the range?

Asked by BG523251711 on 2021-10-29 10:26:25

Sharmman It shows 0.01A screen indication , set zero and you can measure from 50mA but its accurate from 0.5A

2022-04-27 06:53:04 Helpful (0)
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Answers (3)

Sharmman Actuallymine was defective and refunded 'cause one led's copper strip caused short circuit with flashlight body in a while , so I really don't know if my review is representative for good working batch of this flashlight ...

Sharmman 02/02/2022
-- SST-40 version 5000K -- Measured 8,6A max using the highest drain 21700 Samsung 30T (2,15A per SST-40) and found 4000Lm max with 44KCd at cold start and 9° flood angle (Note that 7000Lm require at least 16A current draw of 4 x SST-40 in parallel). If a single SFT-40 & reflector had been used at same current flashlight would had exceed 150KCd. 7135+direct mosfet (WMB023N03 of 4mR RDs(on)) topology is used with TP5100 2A buck USB charger controller that define it as 4000Lm flood EDC flashlight for your walk but nothing close to what vendor advertise that's why it get 4 stars.
Astrolux® EA01S 4*XHP50.2/SST40 11000LM 500M USB-C Rechargeable Anduril UI EDC Flashlight High Lumen Powerful Mini LED Torch 26650/21700/18650/26350
US$66.95 US$78.00
7
Comments (1)
Convoy DIY 17mm SST40 Flashlight Driver with 4 Modes 0.1% -3% -30% -100% Max Power Output 5000mA LED Driver Chip Firmware
US$6.45 US$6.89

Q: what is the voltage output?

Asked by BG450345553 on 2021-06-13 08:29:45

Sharmman At100% of Max power , output voltage = input voltage if current is less that 5A else Vout is &lt; Vin.

2022-02-22 06:38:31 Helpful (1)
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Answers (1)

Sharmman@CaptnKnuspa Thisled has low efficiency and requires 50A at 3,5V and 14AWG wiring in order to reach 9000Lm , there is no single Li-Ion battery that can provide 50A and maintain output voltage >3V. The best solution is only Samsung 30T for a few minutes.

CaptnKnuspa 29/12/2021
I am a little disappointed about this light. The light has an orange-peel reflector (it doesn't work well with a smooth reflector, I tested it and got a significantly dimmed center). The throw is much less than my XHP50.2, SST40 and SBT90.2 FT03s. The lumen output seems to be much lower than the claimed 9300lm - I think the required current for 9300lm is limited by the batteries (I tested with Shokli 20/30A 5500mAh and Keeppower 20/25A 6000mAh) and the internal and FET resistances. I already bypassed the springs and changed the LED wiring with AWG18 wires with minimal success. Don't get it wrong: It is a nice light. But in this size there should be a little more throw. Much lumens can also be produced by smaller lights with some emitters. It is more expensive than the XHP50.2 version, and I prefer the XHP50.2 one.
Astrolux® FT03S SFH55 9300LM 924M Anduril UI High Lumen Powerful Flashlight Type-C USB Rechargeable 18650 LED Torch Long Throw Strong Floodlight for Outdoor Hunting Fishing Camping
US$72.95 US$88.00
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Comments (7)

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