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

Is there any usb meter under 20€ which I should consider? I would like to measure both USB A and USB C powerbanks and chargers…

T66c seems to be little bit too expensive for my purpose… and also its usb C only?

For something compact and simple, you can use the UM24/UM25.

The UM34 is overall worse than the UM25 in terms of capabilities, but it has the advantage of support Dash Charge/VOOC protocols, which is nice.

UM34: https://www.aliexpress.com/item/32880908871.html
UM25: https://www.aliexpress.com/item/32855845265.html

If you want something that’s big and has more features:
https://www.aliexpress.com/item/1005001489704881.html

I’m not sure if I would buy this though, because it’s very big.

TheHWcave has some great in depth looks and testing of various USB meters. i learned a bunch about my UNI-T UT658 :+1:
USB testers play list
i don’t know why he has so few subscribers? i think he’s fantastic.

It’s niche content.

Do I understand right that if I am not interested in OPPO charging protocols then UM34 is better, yea?

@abgx1, if you have no interest in Oppo charging protocols, you want the UM25 actually.

Ah, sure

//one more question, should I buy it from your link to avoid counterfeits or is it safe to buy from random dealer with good reviews? :smiley:

@abxg1, I prefer buying from RD Tech directly.

They are the original manufacturer last time I checked, and have very good support.

It doesn’t matter too much in the end, so pick your choice :smiley:

Sharing info on a new USB-C EPR PD3.1 QC5.0 (240W) tester… ChargerLab / Power-Z KM002C.

The KM002C appears to come in a lite and full version of the per listings on aliexpress.

Also an updated KM003C with slightly larger display may in the works.

Looks like it’s sold out on Amazon. Is possible to purchase this on AliExpress or are counterfeits?

ChargerLAB is the US / English brand with English site and links to Amazon US.

The Chinese brand is Power-Z. They have a separate website: https://www.power-z.cn/ The Power-Z site has links to various online Asian suppliers & market places as well as back to Amazon US.

I suspect these units are too new for counterfeits at this point…. but you are likely to see other brands work with the same OEM to release their version of this unit in time. I.e. The older Shizuku / AVHzY CT-3 / Power-Z KT002 / Atorch UT18 are the same underlying hardware. Shizuku / AVHzY CT-3 / Power-Z KT002 / Atorch UT18 USB Tester and SM-LD-00 Module Review – USB Charging

Here are a couple links that show KM002c and now the KM003C in stock: (Note - I have NOT ordered from either supplier so YMMV.)

KM002C
Aliexpress Update - The link I had saved for the KM002C now takes you to the KM003C. (See below)
Martview - KM002C

KM003C
Aliexpress - KM003C (and sometimes other models)
Martview - KM003C

I am looking at purchasing the Chargelab Power-Z KM-003c myself. They have a YouTube channel so you can see it in action. ChargerLab YouTube Chanel
I can recommend the AVHzY brand. I have the C3 Type-C tester and works very well. I have converted almost everything to USB-C so therefore
I bought the USB-C tester. It has pretty good PC software that you connect via USB-C.

I’m also looking at Witen. But their newest tester (C4) seems to be in beta form still therefore I am waiting. But it also looks fantastic.

I also own the YZXStudio ZY1276 and a couple cheap Keweisi KW-1902c and the KWS-MX18L. The cheaper ones are very basic, but might be all you need.

Check them all out and compare to see which one is best for your needs.

Website for AVHzY
Store where I purchased mine.

Hi All,

My first post and I am a total noob looking for some advice.

I am bought bunch of overlapping USB C accessories for my Surface 8 Pro (Lightning 3 / USB 4) and I would like to measure which combination is the most energy efficient way about them.

What would be the best USB tester for it? I can get TC66 at €25 or FNB48 for €30. I am leaning toward TC66 or is FNB48 a better option for my needs (would FNB48 be better than TC66 for 5euro more)? Or should I look at something else altogether? As TC66 is few years old will it be able to perform voltage / amperage readings on newer USB 3.2 standard devices etc. or can I expect problems - or is it going to be sufficient for my simple task no matter the USB standard?

At the same time my S10+ never fast charged from day one, no matter the charger / cable combo. I wonder if with use of any of the suggested above I could try to diagnose it or would I need something more advanced?

Many thanks

EDIT: I could also get TC64 for €16

EDIT2: Is it already known how FNB58 compare to something like Shizuku / AVHzY CT-3 / Power-Z KT002 / Atorch UT18? and if it is any good? - I wonder if it is worth twice the price of old tech like TC66 (FNB58 currently on black Friday sale).

Hello,

If you wanna do just basic voltage, amps, watts then a cheap on is good or you could check out the cables with the built in W meter. If you want to test cables and have more features like detect the protocol its using, test cables, then I would get the FNB58. I think it’s worth it.

Thanks for coming back to me. So would you prefer FNB58 over AVHzY CT-3?

What do you think about these?

I have ordered FNB58. Delivery in Early Jan 2023 :D…

Let’s hope it will be worth it. I need reference voltage readings.

Hello @sebna @xnode,

I would not be the one to choose what one to get. I would say what interface do you like better and features you need. I own the AVHzY-C3 and just ordered the FNIRSI-C1 (w/Bluetooth). It's the first Bluetooth one as I wanted to check it out. I wish it came in the nice CNC case the FNB58 comes in. I'm all about USB-C, and I have the YZXstudio ZY1276 for USB A and a super basic Keweisi KWS-MX18L and KWS-1902C (the USB-C version). Do I have too many, probably, but they are fun to use.

I ordered a PD Trigger too. USB PD QC Trigger It only does QC and PD, but that's all I use. Why this one. It has lights for each voltage and has a simple button. Now I kinda wish I got one with PPS support.

For the FNB58, this guy goes over its use:

I went with TC66 and FNB58.

As FNB58 flies to me from China it will stay and we will see about TC66 as I can return it.

If FNB58 would do everything that TC66 does and more than I will return TC66 otherwise I will keep both. I guess TC66 voltage reading accuracy is already confirmed but FNB58 is an unknown and FNB48 is not as accurate as some of the better ones. I am guessing for my needs accuracy of either will be plenty enough but we will see.

I wonder if with FNB58 I can use as input USB-A and as output USB-C or is it only USB-A to A and C to C.

@Kaelcan - but if you would not already have AVHzY-C3 would you pick it over FNB58 those days or would you choose newer FNB58?

Thanks for the reply and vid. I have seen the vid already - not to many in English around :slight_smile:

Hi, i have to upgrade firmware in my WITRN X MFI.
I try to see if is available on site but there are all models except mine.
Any ideas? U2 or U2P firmware is good for me?
Thank you so much