Which is the best Usb Voltage Detector Tester ?

Batteries and Chargers Chargers
19

Kcx-017 LCD USB Voltage Current Detector Mobile Power USB Charger Tester Meter
Specifications:

1. Input Voltage: 3V – 7V

2.Input current: <3.4A

3. Parameters that you can test: Voltage of battery. Current of battery, value of discharging capacitor.(Total ten parameters)

4. Communication function: Yes

5. Parameters adjusting function:Yes. Equipment for parameters adjustment: One electronic load, one constant current source. Voltage of constant current source should be set to 8.5V There are 3A, 2A, 1A and 0.3A models for current adjusting.

Here is a example for 3A: When you set electronic load at 3A model, the current will be adjusted step by step. It will cost you about 10 seconds and you can see the result changing procedure in the LCD screen.

When you see the 3A result shown in LCD screen, the adjustment process is finished. You can shut off the electronic load and the parameters will be saved automatically.

6. Clean the data: Push the button until the parameters changed to next sets of parameters. Then release the button. Then the next sets of parameters will be started and they will start from zero.

7. Check the parameters: Quick beat the button double times(within 0.5s), then it is checking model. The LED background will be flash.Then you can see the next set of parameters in LCD screen. Quick beat the button double times again, you release the parameters checking model. LED background be be light with flash.

8. Over voltage or under voltage: An arrowhead will be shown in LCD screen and LED background will flash. Push the button and LED will be light without flash. It will last 30s.

9. Turn on model. The LCD screen will show all parameters within 1s when you connect power supply by Micro USB or male plug of USB with wire.(It is to check whether the LCD screen is good or not). Then you can see the parameters used last time(capacitor and which set of parameters). You also can see the current voltage, current and over voltage or under voltage.

Please see following illustration. USB output port can be connected to a data line, a discharge resistor or the like cable device comprising a data communication function, the data does not affect the data transmission line.

20

Correct. On the phone, and the phone only, the charge will start but stops after a bit. It’s erratic. I’ve even got it to complete but that was after a bunch of messing around so I don’t know what the ‘magic’ was. Probably just luck.

Since I can’t keep the testers in line I don’t know HOW WELL (fast) it’s charging but the ‘better’ cables plug in more securely and charge more reliably.

Interesting issue with the Xiaomi cable vs. AUKEY. Is the Xiaomi a pure (only) charge cable? Cables that also have data capability like the Aukey will signal that to ‘smart’ devices like a cellphone and throttle back the charge. That’s a fairly normal function. There are internet threads on ways to screw with the USB to bypass this.
On my phone a ‘charge only’ cable is signaled with an [AC] designation during charging. A ‘data capable’ cable shows up as [USB] while charging. The AUKEY are ‘data capable’. I did not think to look at that when I got them.

21

Flydiver when it starts charging with the tester how much current flows?
Samsung chargers often have a higher voltage(5.3V or so), I guess the devices won’t charge very good if they don’t get what they need.

22

Didn’t think of the possibility of Samsung having higher voltage. I don’t have the original charger as it’s a hand-me-down phone. I’m using an Aukey 2.4A capable charger.
This starts out at 5.14v @ 0.5A on the phone (right now), but that’s on an almost completely charged battery (90%) so it’s probably throttled down. I’ve seen it near 1.0A before (briefly, before it kicks out).

Having said that, the finishing charge is 4.3-4.35v. 5.0v input should be plenty of differential to do that I would think, and it does charge completely using the same charging system. Batteries come out a bit over 4.3v checked with DVM.

But that doesn’t explain why the charging kicks out when using the Power Tester….does it?

23

The xiaomi cable was bundled with 10400mAh powerbank… It’s also data-transfer capable.
To make a cable a charge only cable… You have to short the data pins… There are also adapters that can do that without compromising the cable itself… But again it is also limited and depends on the section of the wires… Since as the total impedance which is also affected by the wire ipedances rises… The current decreases for the ohm’s law…
I’ve seen the max current flow throw that wire, While charging With the power bank, going over 2A measured with the tester… Flat out… Never seen that on a charger(Sammy note2,sammy tablet 10.1 or Griffin powerbrick 2.4A). Every charger I tested had a max V of 5.13-5.17V.
At 90% if you had 0.5A…you had a pretty good value.

You could also check (roughly) the flowing current using an app called Galaxy Charging current.
deltaAmp are usually within 20%… Meaning the app is overestimating.
The note2 and I’m pretty sure the i9100 s3 batt are 4.35V batteries so you are right about measurement.

Have you tried charging with a spare battery.? … Just to know

24

Yep, I ended up buying the resistor load too :slight_smile:

25

Yeah. I did it too… But it ended I never used it in reality :stuck_out_tongue:

26

Thanks for the Kcx-017 manual Antenne and hank.

27

you probably can get the best USB doctor at www.taobao.com (China ebay):- High accuracy with low impedance, most of them can be flashed when there is new firmware. I own 4-5 of them. Personally I feel they are extremely good, high accuracy (compared with fluke meter) and high quality. For your reference if you can read chinese:-

http://item.taobao.com/item.htm?spm=a1z10.1-c.w4024-5909411634.2.5a53ti&id=38401794937&scene=taobao_shop

http://item.taobao.com/item.htm?id=43646026777&ali_refid=a3_420986_1007:1102217199:N:476158178_0_100:081e8aad95bd445e75eb0952f4607c64&ali_trackid=1_081e8aad95bd445e75eb0952f4607c64&spm=a1z09.2.a1z6e.93.wadikS

http://item.taobao.com/item.htm?spm=a1z10.1-c.w4004-7257832633.17.LojbdL&id=43518439360 same as 3rd one but the latest version with 2 USB.

28

What do you mean with Flashing new firmwares? Do you have more Info on this?
The First one is new to me…so I need it.
Anyone found an eBay source?

29

I think you can find it on ebay just look at “YZXstudio”

http://www.ebay.com/sch/i.html?\_trksid=p2050601.m570.l1313.TR0.TRC0.H0.X5870+vapor.TRS0&\_nkw=YZXstudio&\_sacat=0&\_from=R40

the firmware it’s upgradable, but i think you need to mod it with an interface and than use the proper configure PC settings

30

Hello !

I’d like to buy USB Tester - I see, that some of You recommend Xtar VI01 , but it seems to have quite high resistance that significantly reduces voltage (i.e. by 0,39V at 2A). It worries me a bit, but I can see, that even professional USB tester, like PortaPow Premium reduces voltage (by 0,33V at 2A).

After reading every USB tester review here I think, that this ebay USB meter will be best choice - it seems to be accurate enough and it has lowest resistance, at 2A it reduces Voltage by only 0,26V. As there are more accurate testers, but with higher resistance, here is important question for me - how does the reduced voltage affect charging - can it cause damage to the battery or so? Will ebay USB meter be a good choice, or should I buy more accurate tester but with higher resistance?

Regards
Michal

31

HKJ has just posted a test on another meter here.

32

I found this link:
http://www.aliexpress.com/store/group/USB-Tester-meter/923042_250764074.html

This seems to be manufacturer with some of very interesting USB voltage-current testers.
They are USB 3.0, OLED and with good price.

33

[quote=npprod]
with some of very interesting USB voltage-current testers.

[quote=npprod]
Again - why they are interesting? Can You show us some tests?

There are cheaper oled testers than those…

I’d like to see tests done by independant, trusted website (like this). Before that… “very interesting” is just a word.

I decided to buy this: Test/Review of USB meter: Volt Current Voltage Charger Capacity Tester , seems to be accurate enough and with lowest impendance / voltage loss. Unfortunately it has just disappeared from ebay (it was there 2 weeks ago). I will wait, maybe it will show again.

34

Blue charger doctor is dirt cheap

I don’t know about you guys but I don’t mind having this cheap ones for random chargers while some pricier ones for serious charging.

an error of 0.01± is okay for me

35

Wow, that is the lowest price I have ever seen!
I have a bunch of these that I got HERE
At 1.57 each, they are cheap enough. I have them sprinkled about all over the place. In my car, van by my computer, in the kitchen etc.
I have found that the problem with trying to figure out which one is “best” is nigh impossible. Even after HKJ reviews something, the internal specs are apt to change as the Chinese constantly make changes and cheapen it up.
The one reviewed by HKJ has a lower internal resistance than the ones I bought.

And here is alink to a handy load tester with a 1A and 2A selector. Great for testing these AND portable power banks etc. At only $1.17, everyone should have one. LINK

36

Thanks! I purchased load tester, I’d purchase USB doctor too, but increased internal resistance worries me. But I have found another tester that is very good according to this forum: http://www.buyincoins.com/item/50240.html#.Vf6phZTRphE

Could it be the same as: Test/Review of USB meter: Online Test ?
It doesnt have case, but it seems it is one of the best (if not best) testers reviewed on this forums (Portapow doesn’t count :wink: ).

37

It could be, but then maybe not exactly. Virtually EVERYTHING I have ever bought from China has been slightly different the second time I reordered. Usually not for the better.
ENB power banks AND Ruinovo power banks went from excellent to useless (second batches of both would not charge Apple stuff, even though they say they are Apple compatible)

38

Yep.

Produce a huge quantity, with a lot of variation — test and bin them.

Make sure the top quality ones go to your corporate or political masters and people nearby you who can retaliate.

Distribute the second quality ones to a few people, spread them around, get them reviewed. On the Internetz, you can do it globally.

Then dump the crap bin to people who want to buy more of the same thing. Globally.

Nothing unusual about this.

That immortal phrase “Caveat emptor” did not originate in China.

The above is why “what is the best …?” isn’t usually a worthwhile question to ask. The variability is enormous, even for “the same thing” — all that’s the same is the plastic shell, from one batch to the next.