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  • June-28 2017 07:32:46

    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

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  • February-16 2016 08:43:28

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

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  • November-23 2016 10:19:44

    Güzel parçalar. Sağlam teslim alınmıştır. Tavsiye edilir.

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  • July-13 2020 18:09:14

    Good product.

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  • July-07 2020 05:36:40

    Perfect woks well

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  • June-03 2015 06:54:50

    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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  • October-21 2018 22:53:10

    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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  • June-26 2018 12:59:29

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

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  • October-07 2017 15:43:30

    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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  • February-04 2016 09:27:41

    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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