Home / 32mm 25A BUCK driver for L8 SBT90.2 ,input 3-4.2V

32mm 25A BUCK driver for L8 SBT90.2 ,input 3-4.2V

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This is the new version of the L8 flashlight driver circuit, which supports reverse charging.
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  • Detail

    Mode operation instructions:

    1.click the button  ——>  flashlight is turned on with last brightness ——> press the button,brightness ramping up ——> release and press the button again,brightness ramping down

    2.flashlight off, press the button  ——>  moonlight mode   (0.2%)   [This brightness will not be remembered]

    3.flashlight on or off, 2-click the button  ——>  turbo 100%

    4.flashlight off,3-click the button   ——>  strobe

    5.flashlight off,4-click the button   ——>  tactical mode, only 100% ,4-click the button again to quit tactical mode.

    6.flashlight off,5-click the button   ——>  voltage detection  (* means "flash" ,  *** pause ******* means 3.7V, )

    7.flashlight off,6-click the button   ——>  normal ramping mode switch to 4modes 1%-10%-40%-100%

    8.flashlight off,10-click the button   ——>  Lock mode,The flashlight will flash once under any operation, which means the flashlight is locked.10-click the button again to quit lock mode,Please note that this is the only way to unlock.


    The flashlight has low voltage protection and temperature control protection.

  • Customer Reviews
    D***ry

    I installed a Haikelite H9 in the flashlight. I had to slightly reduce the circuit board diameter by filing down the PCB around it. The flashlight works again. The button backlight only works when charging! It glows red when charging via USB and green when the battery is fully charged. The button doesn't light up at all while the flashlight is on.