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4.96 out of 5
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  • 28/06/2017

    I don't use these to build chargers but to transform old flashlights that use big expensive 4.5 batteries to LED flashlights that can work with one or 2 normal AA batteries. I thought that I have to use a resistor between the output of the DC-DC unit and the LED, but the LED works well without such resistor. I recover the LED ships from dead LED bulbs. I noticed that when a bulb dies, it is often because that one or few LEDs died. The other LEDs on the bulb still OK. Not easy to unsolder and re-solder such small smd LEDs but you can do it with time I haven't tested all 5 modules but the 2 I used worked well. Notice that when the module is alimented by only one AA battery at the input, the red LED does not work and still off

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  • 16/02/2016

    ottimo oggetto per poter elevare la tensione da 1 volt fino a 5 volt totali

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  • 04/09/2015

    I test it with a 18650 3.7v battery for a cellphone usb charger and it works!

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  • 23/11/2016

    Güzel parçalar. Sağlam teslim alınmıştır. Tavsiye edilir.

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  • 21/08/2015

    it great module for step up 3.3v to 5v from CC3D to use telemetry.

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  • 03/06/2015

    Cheap as can be, works like a charm. I used it on a Li-Ion i ripped out of a GPS and rigged it to this and one of the Li-Ion charging boards. no issues ive seen yet.

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  • 13/07/2020

    Good product.

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  • 07/07/2020

    Perfect woks well

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  • 20/08/2019


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  • 01/08/2019

    Good product and work as promised

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