-2

I have an Mi 18W 10000mAh powerbank 3 which I want to use for my project. I need 12 volt output. Although this powerbank supports 12V output, this feature is probably proprietary. A PD decoy module does not give 12V. I need power for a 12V LED strip in a portable photobox.

Is there some solution (decoy module or something) to make the Mi powerbank produce a 12 volt output? I didn't find anything.

JRE
  • 67,678
  • 8
  • 104
  • 179
Abedron
  • 97
  • 3
  • 1
    If you are using that decoy module, make sure you soldered the jumper to tell it to ask for 12V. Better yet, also test the decoy module works against a different power supply. I'm not seeing anything in the spec page that says the power bank provides 12V Output when it is not being charged by a 12V supply. – Abel Dec 22 '20 at 15:41
  • https://www.mi.com/global/10000mAh-mi-18w-fast-charge-power-bank-3/specs – Abedron Dec 22 '20 at 17:14
  • 1
    that's the spec I was looking at. It says "Output ports USB-A x 2" and later says "USB-A x2 5.1V2.6A" which could mean that the only only outputs on the USB A are 5.1V. The line that says "USB-A x1: 5.1V2.4A / 9V2.1A/ 12V1.5A (18W MAX)" has some fishy stuff. Either it's to cover their butts for failing to protect a USB-A port from 12V during charging via a 12V charger, or they meant USB-C in which case they would likely use some form of PD as it's part of the USB-C specs – Abel Dec 22 '20 at 18:16
  • Even if they had meant USB-C, they did not mention it as an output port so the spec makes no clear claims about an ability to output 12V. – Abel Dec 22 '20 at 18:34

3 Answers3

1

You can use a step up DC-DC converter that has a 5V input, which would be far easier to do than trying to spoof a proprietary technology like PD or QC, which as the module you mentioned is not reliable or completely legal.

Adi
  • 189
  • 1
  • 9
  • 1
    I looking for strightforward solution with maximum efficiety, withou DC-DC converter. Maybe for Mi powerbank not exist solution with some like decoy module. – Abedron Dec 22 '20 at 15:04
  • Correct. it will not exist. The protocol likely uses a hardware identification chip that is proprietary hardware by the manufacturer, and is usually protected by IP agreements. – Adi Dec 22 '20 at 15:09
0

Edit: Based on the spec you referenced, I believe the premise that "Although this powerbank support 12V output" is flawed. It supports 12V Input. This is from their spec page saying the outputs are only the USB-A and the images with the USB-C labeled as an "IN1"

If what you are looking at is the USB C power delivery spec that allows laptops to charge over USB C connector, how a device goes about negotiating that is part of the standard rather than 'proprietary,' although which profiles (particularly custom ones) a device supports and how may be.

How does a USB C port provide the power to charge laptops?

Abel
  • 456
  • 2
  • 7
  • Yes, for powerbanks with PD or QC suport it's easier, therefore is here my question for non standard Mi powerbank :) – Abedron Dec 22 '20 at 15:06
  • how do you know that "this powerbank support 12V" and it is NOT using the PD method? – Abel Dec 22 '20 at 15:28
  • https://www.mi.com/global/10000mAh-mi-18w-fast-charge-power-bank-3/specs PD or QC is not mentioned – Abedron Dec 22 '20 at 17:13
-1

If you use 5v charger for charging the powebank, it will give 5v as output. if you use 9v/12v charger for charging the powebank, it will give 9v/12v as output.

V. Saravanan
  • 1