Hand Crank Generator High Power Charger for Outdoor Mobile Phone Computer Charging 30W / 0-28V with USB Plug (Green Generator + DC Regulator)

and I am proud of the power I create. 5/5 would buy myself another energy drink for more power. Oh the device? It's sturdy and small like a mini brick. If you are super hype for the day, it'll act as an power transfer device to squeeze out all the power from you at great efficiency at little to no cost, after paying for the buffet that is. Regardless, you'll definitely want this generator to see how much power you are worth. On the downsides there are quite a few. It is like a mini brick, which is difficult to hold when you are turning the handler especially with a big hand. The good news is the strap can hold quite well. Added something in between will solve it quick and easy. Also, the voltage adapter cable from the aviation socket to the knob is extremely short. When you are turning the handler, the knob will end up hanging, which will encourage it to break as you move the handler. Your best bet is to put the knob on the table and turn the handler near there. Another one is when you use the device enough the inner side of the handler will get sanded off into plastic dust powder. Warning: Do not try to eat those powder. Only very few people gets power from those. Lastly like most mechanical device, there will be some mechanical oil leaking around the generator. Although it helps the turning the handler easier, it may make using the generator messy afterward. Wear gloves if you want. Finally considering that Amazon was able to ship the replacement at an extremely early date (the previous one was missing the voltage adapter), it is a worthy product even with the downsides.

Lets get the elephant out of the room, yes it is EXTREMELY pricy, but what do you get outta it? First off, it weights more than you'd expect from it's pictures until you realize that most of the unit is actually made of metal, NOT plastic like most of the cheaper hand cranks out there. While this does make it heavy, it also means you don't have to worry about it breaking due to it damn near being a literal brick of metal. Second, be sure to check which device I'm actually reviewing in this particular review as some companies selling on Amazon have multiple products or product variations on the same page. If for some reason the category isn't specified on mine, I'm reviewing the Green version with DC converter (the black brick with a knob on it). Quick note, theres actually a difference between the colours. The black one isn't water proof/resistant but the green one is. So if the green one is slightly more expensive, that's why. With that out of the way, continuing on! What the DC converter does is actually allow you to precisely decide what voltage you want to charge a device with. Be sure you pick the correct one or you can damage electronics and other devices misusing this device! To check what kind of input a device needs, it is usually in their manual and for certain power banks, sometimes ON the power bank itself. As an example on how this works without damaging anything, on my power bank(s), they accept a input voltage of 5 Volts (5V). So, I turn the knob on the DC converter brick until it reaches the 5 volts mark. Then plug the converter into the handcrank, plug the USB female connecter on the DC converter onto a USB cord, then plug the other end of the USB cord (in my case, Micro USB) into the power bank input charging port. You're ready to start cranking! As other reviewers mentioned, one feature that puts this hand crank on a entire different level is its adaptive resistance. Physics crash course, "Work" is essentially the energy needed for hand crank generators to work. Work is equal to "Force" times (X or *) "Distance". The more of one, the more work can be done, in other words, more energy to work with. I mention this so it is easier to understand why this hand crank is exceptionally stellar! Because, if you rotate it slowly (less "Distance" per second, or rotations per second (RPM)), it increases the resistance needed to rotate it, meaning you still generate that 5V I need to power my power bank regardless of how fast or slow I'm rotating it since this hand crank adapts based on that speed! Conversely, you can spin it really fast and it will decrease its resistance. This is all done so you don't break anything even if you're going crazy (or going really slow) with the rotating. But again, this is only if you set up your DC converter correctly! If its on the right DC setting, you should be safe to crank as fast or slow as you want! This is extremely nice because unlike other hand cranks, you can just calmly crank rather slowly and still consistently generate electricity to work with without your target of choice turning on and off all the time from the hand crank being inconsistent. I should also mention that the handle of the hand crank has three adjustable positions. The smallest being it completely collapsed, a middle length option, and all the way out. Note that you really have to deliberately go out of your way to get that middle option with the amount of force it takes to actually extend the handle. The handle itself also has three positions. Folded in, folded out, and straight on. Its a little odd that there's a straight on option given how hand cranks work, but the option is there for somebody out there who likes that option. The hand crank also has an adjustable strap to either strap it to a (small) tree and what not to make cranking easier, or strapping it to your hand for a better grip. I have a K-Tor as a back up hand crank generator and the problem with that one (well besides being rather low specs in comparison to this) is that it got really difficult to hold on to it when cranking. This hand crank on the other hand, due to the pretty useful strap, makes it infinitely easier to hold on to the hand crank while going at it. It seems like something that wouldn't be a outstanding feature, but it is. Trust me on this, you're gonna want to strap it to your hand to make your life much easier! The DC converter itself splits off into four different types of plugs: A Mini USB plug (Mini, NOT Micro!), 2 Phi (Φ) 5.5 plugs, and female USB 2.0 plug. The DC converters other plug on the other side is what connects to the hand crank. This kit also comes with Alligator Clips should you want to charge other kinds of batteries/electronics as well. Two pairs of them in fact. One as a Φ 5.5 plug, and the second pair has a Φ12 Aviation socket which plugs into the hand crank. Now for some specs: Rated power is 30 W (Watts) Output Voltage is 0 to 28 V (Volts) Output Current is o to 3 A (Amps) Weight is 480g (grams) and the Dimensions (in mm) is 106 X 64 X 39 Mine also came with instruction manuals for both the DC converter, and the hand crank generator itself. They're coloured and are pretty useful. I recommend keeping them somewhere safe for future reference. All in all, besides being heavy, what you get for that heft (both literally and price wise) is a really useful hand crank that is extremely powerful and easier to use than most of its competition, in addition to feeling like that it can actually handle being used. Seriously, some of these other hand cranks feel like a twig that can break with use. Kind of defeats the point don't it? So if you're in the market for a hand crank generator, I recommend saving up for this one rather than being annoyed with the cheaper, but overall inferior alternatives. PS: While this won't apply to most of them, most pocket sized battery banks for phones, and the phones themselves are generally rated for 5V. So if you're too lazy to look things up and want to charge a phone power bank or the phone itself, switch the DC converter to 5V and get to it. PSS: Just like other hand crank generators, expect it to make quite a bit of noise while cranking away! Its a bit more quiet if you use it slowly with the higher resistance mode (which is automatic based on how fast/slow you're going at it). So if you don't want a super high pitched winey noise that hand cranks are notorious for, cranking it slowly might help!

First - reminder to self... NEVER buy a product when it's the last one in stock on Amazon. I turns out they jacked-up the price by $20. I feel stupid for falling into this trap. The product is built very well. I really bought it more for exercise than anything else. For that, It's making my arms stronger. Each day it seems I can pump it harder and/or longer. I really like the idea of getting a benefit from my exercise - not just the exercise itself. I like the idea that I can power my portable electronics by human power - not just pure sun energy (which I've been doing now for that past 2 years). I have been attempting to charge my Lithium Ion chargers with the hand-crank charger. I'm notice that a mild cranking even for a few hours doesn't do much of anything. I'm ramping up my cranking power to see if that will improve the charge rate. Time will tell - I've only been doing this for 1 week. Again - very well built - the best I've seen. I'm hoping for a decent charge benefit with improved cranking. I'll update my review as I learn more from this device.

The build quality of this Chinese hand cranked electric generator is quite good. The product functions as described very well. The higher you set the output voltage to on the external DC Voltage stabilizing box the more difficult it is to turn the crank by hand. This is normal, as the output voltage load increases, the dynamo's internal magnets encounter more resistance while turning inside the copper coil. You can tell there is a large capacitor located inside the external plastic DC Voltage stabilizer box, because the voltage doesn't instantly cease when you slow down or stop cranking for about two seconds. This is like an output buffer, but for electrical current flow instead of digital computer data. If you get lost in the woods and your satellite phone battery is exhausted, then a few minutes of cranking away on this hand dynamo maybe the difference between getting rescued, or freezing to death from exposure to the elements ? For every three minutes of slowly turning the hand crank my cell phone charge goes up by 1 % 👍😃

Producto como descrito (y con la buena sorpresa de incluir también un acesorio de iluminación, que no era esperado). Lo he testado y carga un teléfono móvil, si bien que hay que ejercitar los músculos del brazo para rodar la manivela (funciona mejor si se usa la cinta para prender el dínamo a un soporte físico estático, pues segurarlo con solo la mano resulta muy cansativo). Pero corresponde a las expectativas.

Se branche sur quasiment tout, recharge les accus.

Lijkt krachtig maar is het niet, snel stuk kan deze wel gaan. Duur en helaas wat onhandig. Met extra veel zorg moet je met deze omgaan plus geduld.

il dc-dc converter non ha il protezione come un fusibile contro il flusso di energia che parte dietroquindi se volete caricare una batteria vi serve o un diode che permete di far circolare lenergia dove serve ma blocca l'energia se circola dietro al converter o un fusibile se la corente e troppo alta. dopo aver provato di caricare la batteria della bici il converter a smesso di funzionare e si sente lodore di bruciatoquindi vorrei ritornare il prodotto