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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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  • 23/11/2016

    Güzel parçalar. Sağlam teslim alınmıştır. Tavsiye edilir.

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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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  • 21/10/2018

    The packaging was good, arrived in individual zip lock bags covered in sponge padding. All modules were looking nice but when I checked all of them, one module malfunctioned. It didn't work as expected while other modules were working fine.

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  • 26/06/2018

    У одного модуля повреждён разъём USB. металлический корпус разъёма деформирован.Я заменил разъём.

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  • 07/10/2017

    Bonne qualité, et petit prix. La pièce me donne entière satisfaction dans son utilisation, à savoir dans une alimentation que je me fais moi-même.

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  • 04/02/2016

    These Step-Up regulators are really useful when someone wants to drive a USB or other device from i.e. a 3,7V Lithium Battery. They provide perfectly stabilised voltage at 5V. The 500-600mA is really almost the max. for these devices, above that it really starts to heat up!!!

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  • 28/03/2018

    All five dc-dc work good! They give good 5v from voltage lower than 2v! And current it gives is enough for supply arduino and one sg90 servo.

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  • 06/04/2017

    Доставка очень быстрая, проверил - все работает. Продавцу большое спасибо.

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