Xiaomi Mi 2 Powerbank 20,000mAh Review - New 20Ah King?

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eas
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QuickCharge requires a timing-dependent handshake to activate the higher voltage/power modes, which is probably a good thing, considering that 9 or 12v could be bad for a normal USB device expecting 5v.

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mud_muncher wrote:
Does anyone know a simply way to force these to run at 12v all the time? Is there a wire you can bridge in the USB cable?

Simply way to force QC 12V ist to use a QC Trigger.
http://lygte-info.dk/review/USBmeter%20QC2-3-MTK-PE%20Trigger%20J7-t%20UK.html
http://lygte-info.dk/review/USBmeter%20RD%20Tech%20USB%203.0%20tester%20...

Read more about USB PP and QC at HKJ’s page:
http://lygte-info.dk/info/USBinfo%20UK.html

More USB wall chargers and powerbanks with USB QC are named here:
http://budgetlightforum.com/comment/1167872#comment-1167872

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angerdan wrote:

Simply way to force QC 12V ist to use a QC Trigger.
http://lygte-info.dk/review/USBmeter%20QC2-3-MTK-PE%20Trigger%20J7-t%20UK.html
http://lygte-info.dk/review/USBmeter%20RD%20Tech%20USB%203.0%20tester%20...

Looks interesting , could probably also be used to limit the voltage to 5V and disable QC on the output for higher efficiency (74.4 vs. 68.4 Wh according to the table above) when time is not critical, e.g. charging the phone outdoors overnight. But it’s an extra device to carry around and adds weight. Does anyone have a better idea? My phone has no such option, at least I couldn’t find it.
angerdan
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The other way around just use an old USB 2.0 cable Wink
Or use a power plug/source qithout QC Big Smile

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angerdan wrote:
mud_muncher wrote:
Does anyone know a simply way to force these to run at 12v all the time? Is there a wire you can bridge in the USB cable?

Simply way to force QC 12V ist to use a QC Trigger.
http://lygte-info.dk/review/USBmeter%20QC2-3-MTK-PE%20Trigger%20J7-t%20UK.html
http://lygte-info.dk/review/USBmeter%20RD%20Tech%20USB%203.0%20tester%20...

Read more about USB PP and QC at HKJ’s page:
http://lygte-info.dk/info/USBinfo%20UK.html

More USB wall chargers and powerbanks with USB QC are named here:
http://budgetlightforum.com/comment/1167872#comment-1167872

Ohh wow, thanks for that. Just what I was after! Would be nice to have an ultra portable 12v supply that is actually the correct mah rating! Do you think it would be possible to parallel two or more in increase the amps?

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you’re welcome!

By the way, it’s wether necessary not practical to do a fullquote of the previous post Wink

mud_muncher wrote:

Would be nice to have an ultra portable 12v supply that is actually the correct mah rating!
Do you think it would be possible to parallel two or more in increase the amps?

Which current do you need for 12V or which power do your 5V/12V devices consume?
Most powerbanks deliver 2A-2.5A per port.

If you need more than 2.5A @ 5V, you can use an y-cable.
https://www.startech.com/Cables/USB-2.0/Micro/1foot-USB-Y-Cable-for-External-Hard-Drive-Dual-USB-A-to-Micro-B~USB2HAUBY1

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angerdan wrote:

Which current do you need for 12V or which power do your 5V/12V devices consume?
Most powerbanks deliver 2A-2.5A per port.

I have a small 12v fridge that runs at 2.5amp on eco mode. Although it does have a millisecond spike on start up. So unsure if two power banks would work in parallel. I know I will only get a couple hours of run time, just more of a dual use testing of the power banks.

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d_t_a
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mud_muncher wrote:
Does anyone know a simply way to force these to run at 12v all the time? Is there a wire you can bridge in the USB cable?

Depending on what you want to do, it’s probably safer to not have it always output 12v all the time (accidentally plugging a 5v device onto a 12v output USB port will likely fry it…

Anyway, this may be what you’re looking for:

5v to 12v step-up USB cable to DC 2.1×5.5mm (5v/2A => 12v/750ma max — possibly good for some low-power/basic wifi routers)
https://www.aliexpress.com/item/USB-DC-5V-to-DC-12V-Step-up-Module-Conve...

or this one (much more expensive) step up voltage regulator/converter with switch (allows switch to 9v or 12v), also DC2.1×5.5m port:
https://www.amazon.com/KUNCAN-Adjustable-Step-up-Regulator-Converter/dp/...

(the step-up module converts the 5v to 12v (this works on any 5v USB power adapter or powerbank, even non-QuickCharge ones) but lower output current only)

or a QC2.0/3.0 trigger (will need to press the buttons to trigger QC2/3 mode and get your USB QC3 power adapter / power bank to output 12v):
https://www.aliexpress.com/store/product/2016-New-arrive-QC2-0-QC3-0-MTK-PE-Trigger-USB-tester-Charger-Power-Bank-Test/2022043_32656980037.html

(this one requests the power output from the power adapter / power bank itself)

~~~~

oops, didn’t notice the QC2/3 trigger device already mentioned above…
(btw, I don’t think the RD Tech USB 2.0/3.0 meter posted above has a “trigger” mode).
Some other meters like the YZXStudio ones also have a QC2/3 trigger.
for instance, this example of a ZY1276 USB meter triggering a QC2/3 wall charger to 12v and powering a small DC12v fan:
https://www.youtube.com/watch?v=BkaZe3HjkhE

~~~~

12v 2.5amps = 30 watts, that seems more than most non-USB-PD power banks can supply. I wonder if a USB-PD trigger can be used to request 12v 2.5A (am not familiar with USB PD yet…) which requires a powerbank that supports Type-C PD output…

The above are just meant as temporary “quick-fixes” probably not designed for long-term use if you really need 12v @ 2.5A, better just get a real 12v power supply that can supply the current your 12v device needs…

eas
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I was interested in using QC2/3 powerbanks as a relatively cheap, readily available and safe way to power a portable Class-D amplifier off of lithium ion batteries. My plans to make a set-and-forget trigger fell by the wayside though when I realized the Blitzwolf BW-P3 I was using could deliver 3.6A @ 5V, or 18W without any QuickCharge negotiation, so I just fed that into a “low noise” (which is to say LC filter on the output) boost converter module and fed the amp off of that, no problem.

It will be interesting to see what develops with USB-PD.

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Anyone have a coupon code for this?

 

angerdan
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eas wrote:
It will be interesting to see what develops with USB-PD.

There will be powerbanks delivering up to 100W with QC soon.
https://www.indiegogo.com/projects/lifepowr-a3-world-s-1st-usb-c-power-d...

Currently power sources up to 89W for USB-C are available. In the future, more devices, cables and power sources will develop maximum power in this direction.
http://budgetlightforum.com/comment/1165978#comment-1165978
http://budgetlightforum.com/comment/1166006#comment-1166006

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Ozythemandias wrote:
Anyone have a coupon code for this?

Gearbest Code 11NOV061 $24.99
d_t_a
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sp5it wrote:
Can anyone confirm that QC from Blitzwolf BW-C10 works with that power bank? I’m asking because QC from BW-C5 I own does not work with that power bank. Mike

Pardon the late reply, I just got the Blitzwolf BW-C10 QC3.0 car charger the other day. I can confirm that it can quick-charge the Mi 20000mAh v2 (PLM05ZM).
I only did a quick check though. USB meter reports charging at 11.6v at 1.10A when I plugged the PLM05ZM powerbank to the BW-C10’s QC3.0 port. Not sure what is the highest current at 12v that the BW-C10 supports in real-world testing, will re-test when I’ve got more time (official spec says 12v @ 1.5A).

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Thank you.
Mike

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Kindle
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Bold first post.

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Kindle wrote:
Bold first post.

Not to mention the specs on that supposedly wonderful thing...
Charging time could be measured by the erosion of stones using 5V @ 1A Wink About 15 hours for a full charge!

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Where in China is Maryland? Wink

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so basically the PLM05ZM is THE BEST power bank of the world at the moment…!
of course among the 20k power banks…. going OVER is just stupid and corrupts portability

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I received a new USB load and meter today and was able to do some output stress testing.

5V: No problem up to 2.4A, output voltage gets a significant bump above 1.5A.

9V: No problem up to 2.4A.

12V: Fine up to 2.2A, which is 26W of power. No phone is every going to draw that much power from a USB-A.

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Hi, can you introduce the USB load and meter?

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d_t_a wrote:
Hi, can you introduce the USB load and meter?

AVHzY CT-2 / KT001 meter and YZXstudio ZL1100 load. Testing the offline curve recording functions right now. I had the ZY1276 but the AVHzY is superior in every way.

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will34 wrote:
d_t_a wrote:
Hi, can you introduce the USB load and meter?

AVHzY CT-2 / KT001 meter and YZXstudio ZL1100 load. Testing the offline curve recording functions right now. I had the ZY1276 but the AVHzY is superior in every way.

!{width:70%}https://i.imgur.com/q8q587ih.jpg!

Thanks, will34.

Maybe you could do a quick-look mini-review of this USB meter in a separate thread? Looks interesting. Just did a Google search, it looks like the CT-2 is also marketed as the KT001 (Power-Z) and the Kotomi Premium (Kotomi “Pre”).

Many new USB meters with more powerful features have just arrived the past year, though one important functionality is interfacing with a PC software and to be able to record/graph/chart data values (which the ZY1276 unfortunately does not — it only outputs raw values, but no in-house PC software that can do graphs other than read values).

Of course, one other thing is whether the USB meter is as accurate as it says (4 decimal places is already very accurate, in my opinion). Unfortunately, would need specialized equipment (like HKJ) to verify that they’re really precise.. I’d like to think that the ZY1276 is factory-calibrated to be accurate (can’t be sure if it really is though..)

Another thing is to allow the USB meter to be powered independently (so it doesn’t drain a minimal current from the USB power device it is testing, which affects the result) — ZY1276 doesn’t have this, but it looks like the KT001 can have independent power source so as not to affect results of the device being measured.

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I especially liked the efficiency ratings Smile

Recharge time 6hr 11min @ 12V/1.6A max (with QC)
I don’t have a QC charger, but I do have a charger that can deliver 3.5A over a standard USB micro cable.
So my question is: Can the PB charge fast without QC but high amp ‘regular’ charge at 5v?

Chargers: 1xBasen BD01 5/5, 1x Gyrfalcon All-88, LiitoKala: 3x100 4/5, 2x202 4/5, 1x402 3/5., MiBoxer C4-12 3/5.
Flashlights: DQG Tiny III 26650 5/5, FiTorch MR35 3/5, Haikelite SC26 HD 3/5, Lumintop Tool AA/AAA 4/5, Nitecore LA10, Sofirn C01 BLF 3200k/5600k, Zebralight H600Fc 3/5.
Powerbanks: EasyAcc 26800 mAh 3/5, Xtar PB2 4/5.
Waiting for: (DQG Tiny) 21700 EDCs. Xtar powerbank that (also) takes 20700, 21700, 26650

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ZoomieFan wrote:
I especially liked the efficiency ratings Smile Recharge time 6hr 11min @ 12V/1.6A max (with QC) I don't have a QC charger, but I do have a charger that can deliver 3.5A over a standard USB micro cable. So my question is: Can the PB charge fast without QC but high amp 'regular' charge at 5v?

 

I made a video about this powerbank, where I also test charging with 5V nonQC.
Seems to top out at about 2A.

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will34][quote=d_t_a wrote:
I had the ZY1276 but the AVHzY is superior in every way.

What are the advantages of the AVHzY CT-2 / KT001 over the ZY1276 ?
will34
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angerdan][quote=will34 wrote:
d_t_a wrote:
I had the ZY1276 but the AVHzY is superior in every way.
What are the advantages of the AVHzY CT-2 / KT001 over the ZY1276 ?

Better interface, easier navigation with 3 button, QC trigger, MFi authentification, USB PD support, PD listener, more user friendly Desktop app, internal memory for 5 graphs… and the list goes on Big Smile

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dodge_911 wrote:

ZoomieFan wrote:
I especially liked the efficiency ratings Smile Recharge time 6hr 11min @ 12V/1.6A max (with QC) I don’t have a QC charger, but I do have a charger that can deliver 3.5A over a standard USB micro cable. So my question is: Can the PB charge fast without QC but high amp ‘regular’ charge at 5v?

 


I made a video about this powerbank, where I also test charging with 5V nonQC.
Seems to top out at about 2A.

That’s a shame because that means a very long charging time for such a beast.
I have 26800 EasyAcc with 2×2.1A. I wouldn’t want to go back to even slower charging.
Often it doesn’t matter it takes many hours to charge, but sometimes, like between flights, it’s ‘essential’ to charge as quickly as possible.
Where ae the powerbanks that charge 60% in 15 mins like modern phones?

Chargers: 1xBasen BD01 5/5, 1x Gyrfalcon All-88, LiitoKala: 3x100 4/5, 2x202 4/5, 1x402 3/5., MiBoxer C4-12 3/5.
Flashlights: DQG Tiny III 26650 5/5, FiTorch MR35 3/5, Haikelite SC26 HD 3/5, Lumintop Tool AA/AAA 4/5, Nitecore LA10, Sofirn C01 BLF 3200k/5600k, Zebralight H600Fc 3/5.
Powerbanks: EasyAcc 26800 mAh 3/5, Xtar PB2 4/5.
Waiting for: (DQG Tiny) 21700 EDCs. Xtar powerbank that (also) takes 20700, 21700, 26650

angerdan
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ZoomieFan wrote:
I have 26800 EasyAcc with 2×2.1A. I wouldn’t want to go back to even slower charging.
Often it doesn’t matter it takes many hours to charge, but sometimes, like between flights, it’s ‘essential’ to charge as quickly as possible.
Where ae the powerbanks that charge 60% in 15 mins like modern phones?

In the future, USB-C with PD will be integrated in planes. So in a few years there’s no need for charging between flights. By the way, how about chargers in trains in the countries you’re traveling?
https://www.ifpl.com/ifpl-deliver-fully-integrated-usb-in-seat-power-sol...
https://www.ifpl.com/wp-content/uploads/2018/02/IFPL-2018-02-AIX-Period-1-Media-Release.pdf
https://apex.aero/2017/09/29/ifpl-solutions-airlines-c-future

Your EasyAcc 26800 contains 99Wh, so to charge it from 0-60% in 15m, 240W would be needed.
I doubt that a reliable phone will pump up from 0-60% in 15m without increasing degradation of the battery.
Modern smartphone batteries ale LiPo batteries and degrade faster. Also the have only 1-1.5Ah, so with 2C 50% in 15m are possible.

With 18650 cells 1.5A-3A are regular. Only few cells can be charged with up to 6A, like the Sony Konion US18650VTC6.
An 4×18650 powerbank charging each cell at 3A you already have 44W of energy consumption. No USB power plug offers 9A at 5V to charge a powerbank with this current.

Even powerbanks with 12V/2A input can be charged with not more than 40W.
https://www.amazon.co.uk/Poweradd-Pilot-Pro2-Multi-Voltage-Notebooks/dp/...
https://www.amazon.co.uk/Laptops-50000mAh-Portable-External-Notebook-Mos...
https://www.amazon.co.uk/MAXOAK-Capacity-50000mAh-Portable-Notebook-Most...
https://www.amazon.co.uk/Litionite%C2%AE-Tanker-Aluminium-connectors-Sma...

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I just take my 12A charger with me Smile
6×3.5A + 3×2.5A + 3×1.5A all a 5v. Simultaniously. Not even expensive. I love that thing Smile

OnePlus’ Dash Charge pushes 4A @5v. (20Watt)

I think it’s no problem to build a 9A charger but the cables would get overly kinda thick…
But 3× 3A should be possible.

Anyway, charging at the max. theoretical speed is possible isn’t even my main point. There is a lot between 2A and 9A (or more as my PB fits 8 cells)

My fav charger

Chargers: 1xBasen BD01 5/5, 1x Gyrfalcon All-88, LiitoKala: 3x100 4/5, 2x202 4/5, 1x402 3/5., MiBoxer C4-12 3/5.
Flashlights: DQG Tiny III 26650 5/5, FiTorch MR35 3/5, Haikelite SC26 HD 3/5, Lumintop Tool AA/AAA 4/5, Nitecore LA10, Sofirn C01 BLF 3200k/5600k, Zebralight H600Fc 3/5.
Powerbanks: EasyAcc 26800 mAh 3/5, Xtar PB2 4/5.
Waiting for: (DQG Tiny) 21700 EDCs. Xtar powerbank that (also) takes 20700, 21700, 26650

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