Review request for HKJ [USB Power Devices]

Could have probably done more than 35W, but didn’t want to push it with just 4 batteries.

Hello HKJ, this Charger looks interesting and has 6x 2.4A:
BlitzWolf 50W Smart 6-Port High Speed Desktop USB Charger With Power3S Tech For iPhone iPad Samsung |
BlitzWolf Electronics Store - Smart Home, Audio, Projector

I put in 4x Panasonic NCR18650B and 4x LG F1L after I tested that they had pretty much identical internal resistance and capacity. The power bank is configured in 4S4P and I inserted one Panasonic and one LG to each parallel pair so at least every series component was as close to identical as possible with this mixed set.

After successfully charging a Macbook Pro at 30-60 watts for about an hour and output about 41Wh (measured with a PortaPow), I tested the voltages of the individual cells as:

1P 3.755 V (F1L)
2P 3.755 V (18650B)
3.751 V
3.752 V
3.753 V
3.753 V
3.752 V
3.752 V

Thank you! they are well matched. Nice

Cells properly connected in parallel auto-balance automatically. In fact, you can combine different cells in each parallel array successfully:

The smaller cells are 10+C rated vs the 50As at 4C. This means the smaller cells will only provide 10 - 12% of the torque during a long sustained load, but provide more than 25% extra cold start torque, which is quite good for a low gear ratio drill mostly used to behead bolts (LoL!).

Trounces stuff with 10mm bits, tested. ;-)

There’s two USB ports on the thing. For reference, on the Omnicharge (similar adjustable power bank) I measured 126 mVp-p and 22 mVrms from its USB ports at 1A. On the QD188 USB1-port I got 310/90 mV, USB2-port was ridiculously bad at 1800/410 mV (yep, that’s 1.8 volts peak to peak). Not much difference between 1 and 2 amp load.

I don’t have a very good cable setup for measuring ripple from the dc out, but at 12V/1A the QD188 was about the same as the Omnicharge at 356 mVp-p and 106 mVrms.

edit: disclaimer, the batteries on the QD188 were almost empty when I did the test
edit2: was able to bring down the noise a bit on the QD188 USB2 (1800mV to 800 mV) by using a different usb power bank to power the ZL1100 load. Should probably use a resistor instead to eliminate all other possible source of noise.

Oh thank you. Is that a ds1054Z you used to test ripple?

Mmm maybe I am going too off topic. If I am correct, may I write you a PM, just in case I have some questions about it?

review request:

I noted there has sprung up a number of USB power meters lately:

a) Satechi USB-C power meter (I think someone may have mentioned this already - for USB type-C only)

b) King Meter Power-Z KM001 (Std and Pro versions) USB power meter [the item looks very similar to YZXStudio’s model ZY1276]

Power-Z KM001

or (the link below contains link to the item’s software download and manual; the software is still ‘beta’ or more likely ‘alpha’ stage; I tried downloading and running the software [without having the USB power meter] and the software is a mix of English and Chinese, on my English Windows 10)

[update: seems like there is a Power-Z KM001 and a Power-Z FL001; the Power-Z FL001 looks like a clone of the ZY1276; but YZXStudio seems to start to announce a new smaller sized ZY1275 that looks to be a clone of the Power-Z KM001 —- these are just my guesses based on the scant info (for now) I’ve seen while browsing around]

(there’s a review/first look (in Chinese, but lots of pictures) of the Power-Z FL001: 惊喜!升级版POWER-Z FL001上手体验 - 充电头网
and the Power-Z KM001: 您与大神只有一个黑金表的距离 POWER-Z KM001之初体验 - 充电头网
including both KM001 & FL001 being used to test a RavPower 26000mAh power bank: RAVpower 26800mAh 双向PD快充移动电源拆解评测 - 充电头网)


c) Kotomi (Plus and Pro versions) USB power meter

- or - (the description of the link below has more detailed references; the feedback section of the link above has an English translation of
the features comparison table)


For Power / Energy logging, I had a VoltCraft Energy Logger 3500 for a few years now, I wonder how it compares with the ZhuRui PR10 Power Recorder. But it seems the VoltCraft Energy Logger is not being sold anymore…

Thanks, I will be looking on some of these meters.
Now I also needs a real usb-c power supply with 20V 5A, anybody have a good idea where I can find one.

With power/energy meters I prefer to test currents ones, I have publishes a test of one more and I have one more in queue.

How about these 87W power supplies:

Anker already offers 60W:

I found a powerbank with 100W USB-C:

There’s a review of USB-C power supplies in the german c’t magazine:

The Apple one is the most interesting one, but I am lacking more detailed specifications.

The c’t looks (You have to pay for the full article) to be about the same usb-c types I have been reviewing, not the smart ones.

Apple is not the best solution for technical innovations (first iPhone even hasn’t GPS and UMTS like Nokia had).

Found some Chargers up to 90W:

There’s a QC 3.0 device list, maybe there are some more power supplies listed.

That is not what I am looking for. I has to be a USB Type-C charger with 100W, not a Quick charger or docking station (That delivers power on some other connector).

I don’t understand why output has to be 100W, yet there are no known devices which can request 100W power.

It do not need to, but for testing it would be nice to cover the full usb-c power range. I nothing better shows up I will probably start with the Apple.

Would be interesting :slight_smile:

Found another USB Type-C voltmeter:

And thanks for the now brand new JustMobile AluCharge review :wink:

How about:

  • a 20A 5V Meanwell-Power-Supply?

What I want is something that understand and reacts to the usb-c commands for power delivery. This is much more complicated than Quick Charge and not something I want to make myself.

Hi, i did find some new and interesting devices (usb power supplies/chargers).
Could be interesting for your queue :slight_smile:

Most interesting would be your review of the YZXStudio Power Bank:

Powerbank which delivers 3A/5V via USB-C:

USB charger with reversible plugs (so work with every cable besides the reversibled ones like fom Blitzwolf)

USB charger with integrated Current and Voltage meter for 1/4 ports (1x QC2.0)

USB charger with current and voltage meter for every of each 6 2.4A Ports:

12V car USB charger with very slim case:

Saw another energy/power meter from ZhuRui-Tec:

LPT200 Lamp Parameter Tester (the name says it’s designed to test LED lights, but the item’s description notes that it can be used to test electrical consumption of most electric appliances)