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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 26% OFF 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 View It
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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 !
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  • ALEXAND Doyou think they have solve this problem now?

    Reply 12/09/2019

  • Sharmman @ALEXAND Idon't know , maybe , the solution for me as an electric engineer is to use higher VF voltage binning Luminus SST-40 !

    Reply 17/11/2019

  • martin17 Thank you for the great reply. I am always worried that these thing start burning while charging.

    Reply 25/12/2019

  • AliExpressShopper @Sharmman hi, your rewievs are incredible. Can I add you on instagram I may have questions about these Flashlights bro. thx please respond

    Reply 17/03/2021

  • shawnterese Howcan I tell what the battery's output amperage is by looking at it?

    Reply 30/03/2021
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