USB power meter/tester thread - YZXStudio, Power-Z, RDTech and more.

Not lower quality, but just not as many functions.

The quick charge mode identifier is a little less 'smart', and some other functions just aren't there such as PD trigger etc...

Anyone know anything about these WEB- series of testers?



YZX usb meter is very good, but the price is too higher …
but RD (ruideng meter ) is cheaper and have more function.
for “”UM24C”:https://www.aliexpress.com/item/RD-UM24-UM24C-for-APP-USB-2-0-LCD-Display-Voltmeter-ammeter-battery-charge-voltage-current/32845522857.html?spm=2114.12010108.1000023.1.5aa25437tcldCc” and “”UM25C”:https://www.aliexpress.com/item/RD-UM25-UM25C-for-APP-USB-2-0-Type-C-LCD-Voltmeter-ammeter-voltage-current-meter/32855845265.html?spm=2114.10010108.1000023.3.39efe6d4UQtfqh”: , it can support PC software and android APP, APP can support 21 kinds languages
and
APP and PC software can export data by excel. it is easy to research the data…

but YZX meter did not have ,
For UM34C, it support USB 3.0 and Quick charge recognition mode:QC2.0、QC3.0、APPLE 2.4A/2.1A/ 1A/0.5A、Android DCP、SAMSUNG, support support OPPO phone VOOC, OnePlus DASH
Though UM34C and UM25C have Type-c port , but there is not trigger, only support type-c charge, not recognition

although for data or some function, it is not better than YZX meter, but for the price , it is already best …
for USB load, there are many choice , LD25/LD35
If someone need more cheaper meter, but colorful display, there is also choice
AT34

Waiting for everyone to discuss …

Probably a very basic question, but it has me puzzled. Most of the USB power meters I have or have seen have Groups. What are their purpose.

You don’t have to reset the mAh/Wh measurements when doing several tests in a row. Just switch the group and retain the old data.

That makes sense I suppose. It would allow you to continue a test later or go straight on to a fresh test and record previous data at a later time. I thought it might have been something more significant I was missing.

I have just bought a ZY1276 from Amazon which appears to have recent firmware. I tried AutoDetect on a new Samsung Galaxy S9 charger expecting the Samsung-AFC 9V protocol go green, but it indicates as red which is not available. It is a genuine Samsung charger and has 9V indicated on it. Has anyone else come across this.

Are you using a high quality cable? Is your phone mostly charged?

I am just plugging the ZY1276 direct into the charger, no cable of phone involved. As I understand it the ZY1276 should list the chargers capabilities with Auto Detect.

Anybody got these?

I got these in for a video, they are clones of one the RuiDeng UPM's.

Link?

Also in your option are they good clone?

Just did a quick comparison, and they seem to be clones of the UM24(C).

Haven't recorded the video yet, as RuiDeng was nice enough to send me their UM25C and UM34C first, and I don't want to make the same video multiple times in a row.

They're in the queue, and will probably get filmed somewhere next week, after that, some time for editing, so mid September or so I guess...

Hi guys, looking to upgrade/complement my Portpilot. In particular, I’m looking for something that can spoof/code the output protocol (DCP, Apple 2A etc.) My Portpilot can, but only the older protocols and it needs a PC to do it. I think the ZY1270 has an output USB port that chooses the code automatically? And the RD Tech USB 3.0 can disconnect the data pins or spoof Apple 2.4A?

Are there any meters with more comprehensive spoofing capabilities? I think the ZY1276 can activate protocols that the supply already supports, if I’m reading it correctly. Oh and I’d prefer one that also tests the supply for each protocol individually like the ZY1276, instead of giving 1 or 2 protocols only. Thanks

Also, lots of power supplies will auto select the protocol now (eg Anker). I want to see what protocol it chooses, but won’t the meter affect the protocol selection? I mean normally the supply only sees the phone and negotiates with it. With the supply-meter-phone the supply is negotiating with the meter instead. Is there any way to get around this?

There aren’t any that test Apple Lightning cables, right? Haha

Hmm. I’m not familiar with PortPilot…

But RD Tech USB 3.0 ‘comprehensive’ tester (that’s what the model is called in the RD Tech AliExpress store) does ‘spoof’ the protocols (in settings).
Another USB meter that does this is what’s called the ‘white-tail’ USB meter, an example of this is the Mantistek ‘white tail’:

As you mentioned, the ZY1270 also has that feature.

However, I’m not sure if one can force one specific protocol to emulate though…

For protocol detection, the new meters also seem to have that feature (not just display 1 or 2 protocols supported, but testing the protcols — note this is not completely foolproof though). The ZL1100 USB load tester also has similar as the ZY1276. The Power-Z meters (KM001, KT001, FL001) also appear to have that protocol detection feature. The RD UM meters only displays the current protocol being negotiated (the UM25/UM34/AT34).

Thanks! The Portpilot was an Indiegogo project about 5 years ago. The only such device at the time, when there was still much confusion and incompatibility.

What happens to the output on the ZY1276 if you choose from the list that says
Auto detect
QC2.0
QC3.0
Huawei FCP

Apple 2.4A?

Tested my ZY1276 for the above options….

- “Auto-detect” will try to detect (request) and list the protocols supported by the charger/powerbank

- “QC2.0” (assuming the charger supports QC2) will list the QC2 voltages 5/9/12/20v and allow you to select that output voltage (only for the voltages that the charger supports)

- “QC3.0” (assuming the charger supports QC3) will list the QC3 voltages 5/9/12/20v and allow you to increase/decrease the output voltage by 0.2v each time (again depends on what voltages are supported by the charger)

- “Huawei FCP” - when I tested this on a charger that lists this protocol, it selects 9v output

- “Apple 2.4A” - I tried selecting ths, but I’m not sure what happened, the screen just refreshed, and I’m not sure if it set to the Apple 2.4A mode or did anything… (the charger I tried supports Apple 2.4A protocol by default)

Thank you! Looks like there isn’t a single meter that meets all my needs. I might have to buy a couple, and maybe a few more PortaPow adapters.

I noticed there are actually 5 different models that look alike and “comprehensive” is the most advanced one:

  1. USB 2.0 3 bit
  2. USB 3.0 4 bit
  3. USB 3.0 4 bit-H
  4. USB 3.0 protector
  5. USB 3.0 comprehensive

And only the two 4 bits and comprehensive models can spoof the output. They call it “charge mode”. They seem to suggest it’s handled by a chip, which will choose the best protocol. A few sellers are selling this under different names but it looks like RD is the original manufacturer? I was about to buy this, then I realized it doesn’t identify the source protocol!