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

Actually literally two post above yours ;)

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?

LOL, my bad
Thank you

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.

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.

Simply way to force QC 12V ist to use a QC Trigger.

Read more about USB PP and QC at HKJ’s page:

More USB wall chargers and powerbanks with USB QC are named here:

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.

The other way around just use an old USB 2.0 cable :wink:
Or use a power plug/source qithout QC :smiley:

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?

you’re welcome!

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

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.

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.

Why don't use a larger power source with higher capacity?

....78Wh - powertraveller.com/en/shop/portable-chargers/professional/powergorilla-now-24000mah/7grvvd
150Wh - goalzero.com/p/352/goal-zero-yeti-150-portable-power-station-220v
..175Wh - orico.cc/goods.php?id=6482
..185Wh - maxoak.net/laptop-power-bank/show/11.html
..308Wh - enerprof.de/shop/batteries/ebike-and-pedelec-batteries/enerpower-li-ion-18650-battery-pack-re10s3p-36v-6x5-8-55ah-29e/
..400Wh - maxoak.net/portable-solar-generators/show/44.html
..434Wh - anker.com/deals/powerhouse2
..768Wh - victronenergy.com/batteries/lithium-battery-12-8v
1000Wh - poweroak.nl/en/product/ps8-english/
1425Wh - goalzero.com/p/485/goal-zero-yeti-1400-lithium-portable-power-station-220v
1500Wh - poweroak.nl/en/product/ps10-english/

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 2.1x5.5mm (5v/2A => 12v/750ma max — possibly good for some low-power/basic wifi routers)

or this one (much more expensive) step up voltage regulator/converter with switch (allows switch to 9v or 12v), also DC2.1x5.5m port:

(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):

(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:

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…

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.

Anyone have a coupon code for this?

There will be powerbanks delivering up to 100W with QC soon.

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.

Gearbest Code 11NOV061 $24.99

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).

Thank you.

Bold first post.