Cheap USB Hand Crank Generator (4K)

I've seen little generators on flashlights, radios, and such that you can crank to charge. This one is supposed to be able to charge a mobile/cell phone. Thought I'd get one and give it a try.

[Oissir]

I reckon a fast modification of 2 belt driven pulleys would fix it and make it more efficient also quieter. 2 metal Meccano pulleys would be perfect. 😁

[GiesbertNijhuis]

Excellent video! The this thing is crap, nobody should buy it. An honest video like this can inform people in time. I am working on a video featuring the same one.

[NutScrewGamer]

I had a similar USB cranking generator shaped just like that. It broke after 10 minute of cranking total.
I probably generated a few watt hour out of it before it became a waste.

[dannyscholtze]

Thanks for sharing this review. Was concerning to buy one of thes but.. now i am going for a real one :-)

[SmartZero-fe]

This "thing" can only produce a max of 0.5 Watts. Yes guys. 0.5 watts! You cannot produce even 5 watts (which is the lowest of typical handcrank-generators i have seen so far) with this tiny motor.

This thing can only produce 5 Volts with less than 0.1 A (max. is 0.09A i assume, which equals to ~90 mA per hour, so you will only get around 1.5 mA per MINUTE of charging). So you CANNOT charge your PHONE with it if you have the USB-meter plugged in as well!
Because our USB-meter eats up that energy (remember guys, a single LED to power up allready costs like 10 mA/hour and this is small cheapo-cheapo power-hungry screen here, so yeah it will easily consume 50 mA/hour)!

This USB-meter is one of he cheapest and easily can eat up 0.25 watts alone! Which is (because i have such an USB-meter as well) why i power my solar-equipment with this not combined to the solar-panels directly. Instead i give it a battery-box so it doesn´t eat up my solar-power. Because a consumption of 0.25 watts/hour equals 2.5 watts in just 10 hours!
So yeah. Forget about this crap thing here.

For comparison: I bought a GOOD hand-crank device (100$) which can easily handle 30-40 watts/hour! that´s about 0.5 watts in 1 MINUTE! So this is nearly ~100 times more powerful than this thing here.

These are the numbers. I can produce 10V with 3000 mAh/hour (10V at 3A) with this hand-crank device. Which equals 30 Watts. And this is AFTER losses! So the losses are allready included here. Which equals 5V at roughly 5000-6000 mAh/hour of charging-performance.

With this power you can charge a small powerbank (10000mAh) about half per hour.

[Lechoslowianin]

I suspect that the generator is good, but you need to be in good physical condition

[Mrsnormasmith]

Thank you I almost bought this junk lol 🤣

[cnstantin]

Yes, but I bet it can charge a Nokia 3310 with just one complete revolution! 👍🏻

[hareth]

Can i charge a power bank with it then use it to charge my iphone x 😅?

[KornholeMcKobb]

Would have liked to see a drill crank the generator. Remove and bypass the gears and measure the amps & volts driven by a drill.

[muratakburakma]

What does it mean that we saw some value for volt but no amp

[melol]

I bought one abd just recieved it today..it don't work at all..was thinking of using it as a mini back up charger for my min radios and handheld.. but nope..it's just crap..just like the guy showed in the video. I too tried the usb tester on it as well and the tester recorded no juice or data at all from the crank usb charger.

[MarcosLevanta]

Hello, can you please provide me the característics of generator I need it for a proyect