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  • 11/06/2018

    I made some measurements of this device. And wrote a detailed review of it at mysku.ru/blog/china-stores/60323.html Main idea: the device does its job. Notwithstanding the fact that it has plastic gears and not so good handle, it can produce energy with all declared voltages. One man can easily charge a phone for a small call in couple of minutes. So, according with my investigation, the efficiency of this device is about 0.22 The generator can be used as a motor. Conclusion: it cost its price, especially if you live in region with electricity shortages.

    Kommentar (3)
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  • 08/12/2017

    only tried so far with USB but didn't need to crank fast (around 60 rpm). showed steady power to devices. with a load it will be tougher to crank but it's got gears and the longer handle makes that easy. great device! sheet of instructions was in Chinese only but no instructions really necessary. I'll Google translate for myself what the warnings say just in case!

    Kommentar
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  • 15/01/2018

    Nice workmanship. Very smooth cranking and gears appear to be well sealed from dirt/dust - hopefully metal. I tried this on the 5V USB output - you must remember to have the voltage selector switch at 5V, or you may damage the devise you're powering. About 60 rpm was required under a load of about 1.5A. Pros: Well built, using brushed motor - size 540? Cons: no safety on USB output - you better remember to set the selector switch to 5V, and it would have been nice if the USB ports were mounted right side up (devices such as the 'USB Doctor' will have the display facing down).

    Kommentar (2)
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  • 04/03/2021

    Super Gerät nach Einbau von Super-Kondensationen!!!

    Kommentar (2)
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  • 25/01/2018

    I received this last week and set up various charging scenarios. Charging USB is a leisurely easy crank. Charging a 12 volt storage battery, on the other hand, takes a lot more elbow grease, faster and harder to turn. Very well made, looks like it should hold up to consistent use. You will need to use it at the end of a table or edge of a counter top so the crank can go above and below as it turns. Then hold the unit down firmly with your other hand. Thinking of maybe setting up a clamp arrangement with a wood block to hold it in place if I need to use it a lot at one time. Bought two more maybe as gifts for friends, maybe as backup. We'll see.

    Kommentar
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  • 19/12/2017

    il generatore è costituito da un moltiplicatori di giri, un motorino a magneti permanenti e un circuito che consente di limitare la tensione di uscita, sui contatti dedicati, ad uno specifico valore. Il generatore è di buona fattura ed è abbastanza robusto per la potenza erogata.

    Kommentar
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  • 15/01/2018

    fairly fast shipping good portable power supply does what it says top seller A+++++ thank you good for camping or emergency plus many other uses good for charging batteries when outdoors. recommended

    Kommentar
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  • 10/02/2018

    Чтобы поддерживать нужное напряжение нужно крутить ручку очень быстро и интенсивно чем больше ампер нагрузка у подключенного потребителя тем крутить становится тяжелее и ток бльше 1Ah поддерживать не получается вырабатывать 12V ваще трудно замучаешься крутить руку можно накачать при таком кручении ручки :-))

    Kommentar
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  • 04/12/2019

    Overall good for the money. Note! If charging a battery,you will get a back feed to the motor/internal generator since it doesn't have an internal diode. So you will need a diode on the positive side of the output. Was surprised when the handle started to rotate on its own when hooked up to the charge battery. Handle mount sloppy since the fastener is a small screw with double nuts. Bolt too small for the receiver side hole. But for the money, not bad.

    Kommentar
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  • 09/07/2019

    manque un régulateur de tension ou de vitesse malgré une vitesse a peu près constante il y a trop de variation dans la tension

    Kommentar
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