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4.92 out of 5
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  • 15/07/2020

    Fast delivery, they are very practical and inexpensive, 100% recommended work at 100% maybe order those that are for more batteries, are very practical

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  • 09/05/2019

    I bought 5 pieces, tested them, worked well, removed the correct tensions at a load of 1 A, we did not test them at a load higher than 1 A.

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  • 29/03/2019

    Best for ardunio boards and mobile charging Output voltage 5V and amper not measured but it is approximately 1amp. built quality is also excellent.

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  • 13/08/2020

    Good, took two, both workers. After sending it was necessary to activate- power on charge, micro USB, then began to give in load- 3.3 v., 5 v. and USB output. The switch on the USB output is weak, it's better to short it.

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  • 20/07/2020

    3 Pieces, Packaged well. All Works unexpected. (DOA) Do not charge (attaching to charges - charger goes to ovearload protection mod - switches off) it' s due to chortened chargeing circuit (~ 0,09 Omh between (+) and (-) pins on micro USB Do not converts properly: * Must 3V , Actually 1,264 V; * Must 5V, actually 1.186V

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  • 13/04/2020

    Nice product that I use as power reserve for Arduino or ESP32 projects. The only drawback is the mechanical strength of the mini USB plug (not related to the product manufacturing but the plug itself), so I put some epoxy glue around the mini USB plug to strengthen it.

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  • 21/02/2020

    I couldn't use it. The 18650 battery on hand has protection circuitry and is approximately 69mm long. The terminal of this product was also a leaf spring on the negative side, so no battery was put in. I wanted an explanation that "the long 18650 can't be used." Like the battery box in the photo, the negative side can be used with coil-shaped terminals.

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  • 10/01/2019

    you would need to purchase a 18650 Li battery, insert it, and you have a great UPS for your projects. it has 3.3 and 5V output, the 5V is 1.7A, and not 4.... but it okay. You have to detach the load, if you over discharge the battery, otherwise the charging process will be not started!

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  • 29/09/2021

    Well set up and with exit and entry directions, everything looks right.

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  • 17/02/2021

    very good usb charger custom made.

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