Using USB Port Meter BTE-147 for Li-ion Capacity Measurement - Differences with USB 3.0?

Hello,
I wanted to ask users with such equipment if it is able to determine the similar capacity of a Li-ion cell because I would like to use it mainly to measure capacity because other measurements are going to be done with a multimeter. I noticed that such a USB meter is available in 2 versions, for USB 2.0 it is BTE-147, while for the USB 3.0 version I did not find the manufacturer's name. Below are illustrative photos.
USB 2.0

USB 3.0


At first glance, they differ in the way of mounting the through-hole and surface-mounted displays.
Capacity measurement I need to measure GSM battery status, real capacity of powerbanks, Li-ion 18650 cells, etc.
If someone has a code name of the USB 3.0 meter, I would ask for it, it will be easier to find.

The second version is KWS-V20.

LA72 wrote:

The second version is KWS-V20.

Yes, but it is also USB 2.0, just a different designation of the first BTE-147 model and I meant this USB 3.0 because it has a wider measuring range.

For USB 3.0, look for "Rui Deng OLED USB 3.0".

I own the first one myself, it works perfectly. I measured the batteries in phones and powerbanks, you can sometimes be surprised at the actual capacity and declared. It has a wide range of 0-20V 0-3A operation.

Which exactly model do you have kws 20 or this 147. I would not want to cut because they give different data on each page. If the former has such ranges, it should be enough for me. The latter probably much more expensive from what I saw. I would like this invention to embrace the capacity of 18650 because the modeling charger is about 100 PLN and I found the first model for PLN 20. Probably 5-10 times smaller real capacity in power banks.

BTE-147, I do not know if exactly the same model but the manufacturer agrees and the appearance.

E8600 wrote:

Probably 5-10 times smaller real capacity in power banks.

No exaggeration, the Chinese 2200mAh is a real 1580mAh

Well, I saw a Chinese 30,000 and it was actually 5000mAh. Therefore, a useful case such a gadget. It is better to make a powerbank yourself, it will come out cheaper than the branded one because in Chinese there is still a myk with a Chinese unit wrongly labeled as mAh.

I also have the model from the first photo and I can confirm the usefulness of this gadget

I do not know how much to trust the manufacturer's data, the second model of the USB 3.0 meter only has a voltage range of up to 13V and the cheaper one for USB 2.0 has a range of up to 20V, if the data from the net is true, the USB 2.0 model, which costs PLN 20, is more profitable. I found the OLED display for PLN 44. The USB 3.0 port is downward compatible so it doesn't pay to pay extra for the OLED display itself.

If someone cares about quick charge functions, I recommend a more expensive model that supports USB 3.0 and voltage up to 30V.


Following the auctions, I found the marking of this miracle from 2 photos, it is BTE-143 looks like this, so as not to be mistaken:


I still found such data that someone would like to buy:
KWS-20 voltage up to 9V
KWS-21 voltage up to 20V
The only difference is the voltage, the rest of the data is the same

I will throw in my three cents regarding Chinese power banks, they have a patent for large capacity in the form of sand cells. Here, for example, you can see how it is done http://plumbi.pl/blog/?p=101 there are also hard drives with pendrives and nuts or capacitors one in the other. Chinese technical thought is not limited.

Does the measurement with this meter make sense ??
Does the amount of current "come in" when charging shows the real battery capacity
I think not, the capacity would show such a tes but discharging the batteries

The current measurement is on a resistor (I don't remember the value) which causes quite a significant voltage drop at higher currents. Besides, it measures the energy delivered to the device during charging, not the actual capacity.