DUMVOIN USB QC3.0 Charger with 4 Quick Charge 3.0 Ports for iPhone 8/8 Plus/7/7 Plus,iPad Pro/Air 2,Galaxy S8/S7/Edge, Note 5/4,LG G5 (Qualcomm Certified)

Great concept. Typical overseas manufacturing execution. Only one other company makes a charger with more than two QC 3.0 ports, and it's discontinued, so this brand is all we have right now.However, the quality control is not there. This is my second one. The first one, the very first time I plugged it into the wall, it made a "popping" noise. Yes, it sparked. Straight out of the box. However, it still worked (I tested it with a voltmeter and a device I didn't care about). It still charged, but it produced copious amounts of electronic noise. Lots of screeching and whining, both in the charger itself, and the device it's charging. It did this with a battery pack, a tablet, and several phones. It squeals and whines with nothing plugged in, and gets louder the more you plug in. I thought it was defective, because it would spark every time you plugged it in, no matter if any devices were plugged into it.However, upon receiving my second one, I discovered that both chargers made these noises. The second one doesn't spark, thank God.As I mentioned, I have a little USB multimeter that tells me the voltage and amperage of each port. I test all my chargers and cables now, since cables can start to fail and still "charge", albeit at a slower amperage. So keep that in mind. Not only are cables not created equal, they fail in ways that they technically are still working, but just not optimal.So, I tested both of these chargers, comparing them to factory QC chargers, and iClever and Amazon Basic charges, etc...and everything was great at first. Showed 9+ volts when it was supposed to, etc. When it wasn't a QC device, it'd charge at 1.7~2 amps, which seemed cable dependant, and that's an expected performance. I was happy, mostly.Well, just like the first one, this didn't last long. Today I lost one of the four ports. It just won't charge anymore on that port. It also makes *more* electronic noise on the failed port. The meter shows 5.6 volts, which is way out of spec (this is not a QC device, so it shouldn't be much over 5 volts), and no amperage. When I plug in a device through this meter, it doesn't charge. No charging symbol. I take out the voltmeter, same thing. No charging symbol, and the phone doesn't charge.I had two Bluetooth headphone sets I had to return a week ago. I charged them exclusively with the first Dumvoin charger. They both got too hot while charging and refused to turn back on. I didn't think about it at the time, and I can't prove it, but I'm wondering if the Dumvoin killed them. I haven't had anything else die...yet. But then again, I've never had any device that charges by USB die on me, ever, before these two in a row, charged only by this charger.I'm returning this one, before I fry a device or it catches on fire. I'm still on the fence about wanting to try a third. I doubt it.

Received this today and tested it. Nothing I own will detect it at all and nothing charges at any speed. Tried several cables, tried reversing plug still nothing. It has no power light so can't even tell if it is getting power. Very disappointed. Looks like I will have to send it back which is a royal pain.This is an update to the original review which is now changed from a 1 star to happily an enthusiastic 5 star.I was contacted by the seller who sent me a replacement device for free to try. It works exactly as I hoped. In fact it fast charges my S7 which I really did not expect it to do! Totally satisfied and pleased with this product and seller!

Great product, this is the only charger I have found with more than 2 QC3.0 ports available. Everything works great with all 4 ports able to quick charge my devices. Definitely recommend, especially with more and more things supporting quick charging. Even if you have a standard 5V device the ports can source up to 3A each at 5V.

I've had this unit for a few months and it was awesome. That said while in Hawaii it started to make a cracking noise and then smelled like it was burning. Obviously I couldn't use it any longer and it was My only charger. You don't want to know what it cost to buy a charger at a five star resort on Maui. I am hoping the people at Dumvoin will honor the warranty and replace the failed charger because when it worked it worked well and it was an excellent piece of equipment but at this point i don't know how to contact them. Ill do my best and update this in the near future. Dumvoin if you read this please get back to me

Bought because it was the only 4 port QC 3.0 charger I've found. Returning it because its not working with a QC 3.0 device. They claim it is Quick Charge 3.0 certified but I'd need to see the certification papers before I'd believe it. Plug it in and it starts in "normal" non-fast charge mode, then it negotiates and jumps to "fast" charge mode and this is where all my other chargers stay.. But this one continuously jumps back and forth between "normal" and "fast" modes which leads me to believe it cannot maintain the correct current/voltage levels to stay within spec and thus the drop out. Tried other cables that work fine with my other chargers so it is not the cable's problem either.

I just received this product yesterday it was working great I disconnected it from the wall after my phones were fully charged I went to plug it in again earlier and it doesnt even work anymore update 2/18 great response time will further update when I get a reply. Will give another star for that/ update i received a replacement with no hassle the product i intially received was a lemon as they say and it happens I'm glad to say this was a very nice experience and I was treated as priority not some oh well no refunds I'm thrilled with the charger it works outstanding and can charge anything with usb required and even charged faster other devices I would say by 15 to 20% faster and ever charges my v20 and v10 much more faster than the factory charger great customer service and grear products at great prices Thanks sincerely Leo recio

Have had this for 8 months and it works great. I charge 4 devices at a time, usually a couple of e-cigs, a kindle, and a Axon 7 with QC3. Very fast. Measured the current at up to 3 Amps at time on the phone. Will update if it dies. In fact I came back to buy another one but found it no longer available. Other chargers only have maybe one port that handles QC3 if that.

Was looking for something that I could take with me while travelling to the Philippines because i did not want to bring a bunch of different wall chargers for both me and my wife. We both brought phones and tablets so having 4 ports was perfect. Quick Charge worked as expected on my Galaxy S7 Edge and my wife's Note 5, and i did not need to bring/use a voltage transformer as this is capable of an input voltage of 110-220 (as is most wall chargers phone come with)