Test/Review of BlitzWolf 24W Dual wall charger

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HKJ
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Test/Review of BlitzWolf 24W Dual wall charger
BlitzWolf 24W Dual wall charger

DSC_1544

Official specifications:
  • Power3S Technology:Intelligently identifies the electronic device and speaks the language it needs for full speed charging.
  • Electricity-24W of Power:Smart digital power output,can charge any two smartphones or tablet devices simultaneously at top speed.
  • Safe and Sturdy Design:Lightweight,compact and easily portable.
  • Input: AC 100-240v 50/60Hz 600mA
  • Output: 5V /4.8A (Each 2.4A MAX)
  • Size: 53 X 53X 25mm /2.09X 2.09 X0.98inch
  • Color: White

I got it from Banggood

DSC_1535 DSC_1675

I got this charger in a fairly plain cardboard box. The square one is the US version, the other one is the EU version.

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The box contained the charger and a instruction sheet.

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I got four versions of the charger: black/white and US/EU, because I got the white US first I did most test with that version.

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DSC_1539 DSC_1540 DSC_1541

DSC_1542 DSC_1543
DSC_1545

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What cannot be seen on the pictures is the blue led inside the charger, this means there is a blue glow from the two usb ports when the charger is powered.



Measurements
  • Power consumption when idle is 0.2 watt at 230VAC and 0.15 watt at 120VAC
  • All outputs are in parallel.
  • No individual port overload protection.
  • Usb port coding is automatic selected (Up to Apple 2.5A).


BlitzWolf%2024W%20top%20load%20sweep
BlitzWolf%2024W%20bottom%20load%20sweep

Good efficiency, but no individual overload protection on the ports.

BlitzWolf%2024W%20load%20sweep

The common overload protection kicks in at about 6A.

BlitzWolf%2024W%20(Black%20EU)%20load%20sweep
BlitzWolf%2024W%20(Black%20US)%20load%20sweep
BlitzWolf%2024W%20(White%20EU)%20load%20sweep

Same as above, but with the other supplies.

BlitzWolf%2024W%20120VAC%20load%20sweep

With 120VAC supply the overload protection kicks in a little bit earlier.

BlitzWolf%2024W%20load%20test

No problem running at 4.8A for one hour. The two fall-outs at about 47 minutes matches with when I moved the charger around to get the IR photos, i.e. the US mains plug and adapter combination did not maintain a stable connection.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp2484

M1: 49,0°C, M2: 46,5°C, HS1: 65,5°C
HS1 is the rectifier.

Temp2485

M1: 53,5°C, M2: 52,1°C, M3: 46,5°C, HS1: 55,9°C
HS1 is either the transformer or the two small diodes (D3, D6) under the transformer.

Temp2486

M1: 51,7°C, M2: 53,3°C, M3: 43,8°C, HS1: 60,5°C
This time HS1 is the transformer.

Temp2487

M1: 41,6°C, M2: 44,5°C, HS1: 55,1°C

Temp2488

M1: 58,1°C, M2: 50,7°C, HS1: 62,5°C
HS1 is the rectifier.

10ohm

At 0.5A the noise is 19mV rms and 650mVpp.

5ohm

At 2.5A the noise is 19mV rms and 550mVpp

2ohm

At 5A the noise is 20mV rms and 570mVpp.

1ohm

At 5A the noise is 13mV rms and 300mVpp.



Tear down

DSC_1683

I could not open this with pressure, I had to cut it open.

DSC_1685

The mains is attaced with the red and black wires, it goes directly to a fuse and after that a common mode coil. There is also a normal inductor. U1 is the switch mode controller IC that controls the transistor (It has its back to the slot).
On the low volt side is a rectifier and a inductor (L4). Between the two usb connectors is the automatic usb coding IC (U4).
The blue part is a safety capacitor and below it is the optical feedback IC.

DSC_1687 DSC_1688

On the first picture the common mode coil and the inductor can be seen. On the second picture the blue led between the usb connectors and the safety capacitor with the opto coupler below it can be seen.

DSC_1689 DSC_1690

The rectifier can be seen here and it does not have a heatsink, this is very uncommon for a 5A usb charger, but there is an explanation.
The input fuse is the red block, it is a 2A fuse.

DSC_1686

On the bottom of the circuit board is the bridge rectifier. U3 is the controller for the opto feedback. The secret for leaving out the heatsink can be seen here. The rectifier is not a diode, but a transistor and U2 is probably the chip controlling it, this is called synchronous rectification and is much more efficient than a diode.

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There are two places where mains and low volt side are a bit close, but not closer than the rules say.


DSC_1682 DSC_1684

The slot in the circuit board is used for a plastic shield that secures very good distance for most of the parts.


Testing with 2500 volt and 5000 volt between mains and low volt side, did not show any safety problems.



Conclusion

This is a good usb power supply with only minor details that could be better:
I would have liked the blue led visible from outside, even with both usb outputs in use.
The peak noise is a bit high (but I doubt it will interfer with anything).
The charger can deliver up to 6A into a single usb plug, this is a bit too much.



Notes

All measurements are done with the white US version at 230VAC, except where otherwise noted.
The usb power supply was supplied by Banggood for a review.

Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

thijsco19
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Thnx, great review!

tatasal
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“The charger can deliver up to 6A into a single usb plug, this is a bit too much.”

6A ? Ouch…

HKJ
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tatasal wrote:
6A ? Ouch...

Yes, sadly it is nearly all multiport chargers that has this problem.

Fixing it makes the electronic more complicated and increases the loss in the charger (i.e. more heat).

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

zelee
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Single port up to 6A?
Good thing i got a usb power meter

mongoose
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Thank you hkj, been waiting for this one. Smile

homer

agent80
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Superb review!! Thank you. Looks like a great quality charger

M4D M4X
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great review quality as always !

thank you!

PLEASE NOTE
i do not work in "reviews, deals and codes" for the time being
maybe M4D M4X will return one day, but until then:

THANK YOU FOR YEARS OF YOUR SUPPORT AND FRIENDLY CONTACTS!

MountainKing
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Hum…Your review says good charger but then you say it has no INDIVIDUAL OVERLOAD protection per port…

Does that mean it can fry a unit being charged if only one port is used and say 5-6A goes into it or something? (Sorry if that question is newb or does not make sense)

You also say “The charger can deliver up to 6A into a single usb plug, this is a bit too much.”.
What is the implication of this?

Thanks for your review as always Smile

Never ever forget and forgive. Niwal**er new kid on the block trying to act tough.
http://budgetlightforum.com/node/24847
Do not support this brand.

DINODIRECTSCAM COMPANY. DO NOT BUY
http://budgetlightforum.com/node/11324?page=2#comment-254983

kuoh
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If there is a short in the cable, that much current can possibly damage the pins in the USB port depending on how long it is left plugged in.

KuoH

MountainKing wrote:
You also say “The charger can deliver up to 6A into a single usb plug, this is a bit too much.”. What is the implication of this?
agent80
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Can it damage the phone?

HKJ
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MountainKing wrote:
Hum...Your review says good charger but then you say it has no INDIVIDUAL OVERLOAD protection per port... Does that mean it can fry a unit being charged if only one port is used and say 5-6A goes into it or something? (Sorry if that question is newb or does not make sense) You also say “The charger can deliver up to 6A into a single usb plug, this is a bit too much.”. What is the implication of this? Thanks for your review as always :)

Devices will not take more current than they need, the only time the high current will be a problem is if you have a defect usb cable or the device you want to charge is defect. In most cases the 6A protection will prevent anything from happening, but there is a small possibility that the cable might melt or in some even more unlikely cases catch fire. The biggest risk will be if you uses thin cheap usb cables, they are easier to damage and will get hotter when overloaded/shorted.

If you are near the charger it is easy enough to stop if you see it or smell it: just pull the charger out of the mains socket.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Trevi_lux
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Is ok this for a charger like Xtar VC4?

HKJ
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Trevi_lux wrote:
Is ok this for a charger like Xtar VC4?

Yes, all test copies was above 5 volt at 2A. This means that there is enough voltage and current.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

g_sintornillos
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WOW! Just what I need!

Sorry for my bad English (gogole transtorla)

MountainKing
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Ordering. Thanks HKJ! First order from banggood!

Never ever forget and forgive. Niwal**er new kid on the block trying to act tough.
http://budgetlightforum.com/node/24847
Do not support this brand.

DINODIRECTSCAM COMPANY. DO NOT BUY
http://budgetlightforum.com/node/11324?page=2#comment-254983

Halo...
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Thank you HKJ.

Worth noting that BlitzWolf is owned by banggood. The blitzwolf trademark is listed as owned by Guangzhou Banggood Network.

But like many products, blitzwolf/bangood devices are likely manufactured by a 3rd party. On amazon you can find RavPower and iclever branded chargers with identical appearance and specs. Likely manufactured by the same company and also identical inside. Lots of reviews on amazon, including a few reporting units that were defective, died, or smoked and burned. RavPower offers 2 years warranty and free return shipping for 6 months.

RavPower model RP-CU11

All of them have the same blue led visible inside the ports.

Of course the EU plug is also available.

HKJ
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Halo... wrote:
But like many products, blitzwolf's devices are likely manufactured by a 3rd party. On amazon you can find "RavPower":http://www.amazon.com/dp/B00OQ1I2C2/psc=1 and "iclever":http://www.amazon.com/dp/B00VFT0V9K/psc=1 branded chargers with identical appearance and specs. Likely manufactured by the same company and also identical inside.

Identical appearing product manufacture on the same factory does not mean identical quality. There is nothing preventing the factory sorting the finished product (or parts) in multiple bins, depending on tests.

I have seen identical looking units with significant performance differences, due to small differences in the construction. This is most likely due to different generation of the design and not as much depend on what factory made the unit.

I do not know what requirements Banggood has for their supplier, my review can only deal with the units I received.

 

Until now I have only received BlitzWolf products (3 different chargers) that have performed fairly good. If Banggood wants to use this brand for their premium products I approve of that (I will always approve a way to identify good products).

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Halo...
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Would you be willing to test one of them?
iclever amazon.de
Some Ravpower on ebay.co.uk ship to Denmark like this one.

HKJ
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Halo... wrote:
Would you be willing to test one of them? "iclever amazon.de":http://www.amazon.de/iClever-IC-TC02-Ladeadapter-SmartID-Technologie-Sma... Some "Ravpower on ebay.co.uk":http://www.ebay.co.uk/sch/i.html?_sop=15&_ipg=200&_from=R40&_sacat=0&_nk... ship to Denmark like "this one":http://www.ebay.co.uk/itm/USB-Charger-RAVPower-24W-4-8A-Dual-USB-Wall-Ch...

Of course I will, but I will not buy one just now, because I have usb chargers enough for the next 3 months. If anybody sends a charger to me it will usual be placed very near the top of the queue.

If you want me to consider it at a later date, when I have less in queue, please post in my usb request thread. I usual order from the request threads when my queue is getting low.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

akhyar
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Thanks for the review HKJ.
Excellent, as always.

Now waiting for the unit to arrive from Banggood in snail mail :bigsmile:

Cula
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Thank you for another great review HKJ.

mongoose
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akhyar wrote:
Thanks for the review HKJ.
Excellent, as always.

Now waiting for the unit to arrive from Banggood in snail mail :bigsmile:


Yep, same as that. Will utter the words “is it for me” more times than a child asking “are we there yet” on a long car journey Big Smile

homer

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Quote:
HKJ wrote:

Review is scheduled to be posted on Friday.

And I replied: And even when the charger is not the best, the review itself sure is H)

I was right Wink , this is once again one of your thoroughly investigated reviews.
And the verdict on the charger is also quite good. I even feel safe enough to give it to my wife.

You are a flashaholic if you are forced to come out of the closet, to make room for more flashlights.

Wilson
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Maybe this question has been asked before in some other place

The US version has a swivel plug for the mains. Is this worse than the fixed plug on the EU version? I would think that over time there could be problems with dust or loss of continuity.

Inquire…Choose…Proceed

HKJ
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Wilson wrote:
The US version has a swivel plug for the mains. Is this worse than the fixed plug on the EU version? I would think that over time there could be problems with dust or loss of continuity.

I would also suspect there is a risk for that, but I have seen it on a lot of equipment for US with folding plugs and until know I have not seen complains about bad connections.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

sixty545
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Wilson wrote:
Maybe this question has been asked before in some other place The US version has a swivel plug for the mains. Is this worse than the fixed plug on the EU version? I would think that over time there could be problems with dust or loss of continuity.

Like this:

HKJ Wrote:

The two fall-outs at about 47 minutes matches with when I moved the charger around to get the IR photos, i.e. the US mains plug and adapter combination did not maintain a stable connection.

HKJ
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sixty545 wrote:
Like this:

No, that was the connection to the adapter, these cheap US to EU adapter are not very stable when moving them around.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

TheBo
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I noticed a bit of high Vpp ripple (3-4x times) compared to their 5 port 40W charger. Guess components dimensioniong counts a lot. Also If i recall correctly that one actually had single port output fuses.

——EDIT——-
FOrgot to thank you HKJ. Beer

Rufusbduck wrote:
Getting discouraged is normal but doesn't finish the job.
hank
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> swivel plug

Well, over the years, I have had three or four of them fall apart. Only one of the four in a way that caused a direct short circuit.
Cheap plastic that dried out and cracked apart, or swivel connectors that fell apart letting the wires move.
Possibly the fire safety requirement to use better plastic has changed that.

Speaking of change over time:

Quote:
Identical appearing product manufacture on the same factory does not mean identical quality. There is nothing preventing the factory sorting the finished product (or parts) in multiple bins, depending on tests.

I have seen identical looking units with significant performance differences, due to small differences in the construction. This is most likely due to different generation of the design and not as much depend on what factory made the unit.

It would be — fascinating — to see you repeat a test on new samples after some period of time, to see if items become more cheaply made.

HKJ
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hank wrote:
It would be -- fascinating -- to see you repeat a test on new samples after some period of time, to see if items become more cheaply made.

Yes and that would also be interesting for the batteries I test. In both cases the main limitation is my time.

Sometimes I do check different brands, that looks alike and it can be very interesting to compare the results and construction. I have tested a couple of chargers with the same size and construction as the 5 port BlitzWolf, there are some performance difference between them.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

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