EZ Book 3 pro charger

[sportnok]

https://m.aliexpress.com/item/32819040979.html

This one.

[Andy]

I was just wondering, would Xiaomi powerbank 2 20 000mAh charge it?

I think, 12V 1,5A could be sufficient to charge if notebook was turned off. Can someone try it?

[joe321]

I tried it with several powerbanks which support QC2 and QC3 (Xiaomi powerbank 2 10Ah and 20Ah). You need an additional circuit to force 12V output from the powerbank: https://www.aliexpress.com/item/1PCS-QC2-0-qc3-0-Tester-Automatically-Detects-Phone-Quick-Charge-Voltage-Meter-Simulator-Trigger-9V/32771660912.html. Than the charging works.  Oh and  you have to make your own  wire from usb to power plug. Mind you that the powerbank does get quite hot outputing 18W for a long time…

[Johannes]

sportnok wrote:

https://m.aliexpress.com/item/32819040979.html This one.

Have you tried this one yourself?

[joe321]

Yes, it works, but I think powerbank efficiency suffers, even a  Xiaomi powerbank 2 20000 mAh gets really hot after 30 min of use… The “force 12V circuit” itself  gets just a little warm to the touch…

[Andy]

So you don’t recommend to use it that way to charge notebook via power bank. Thank you for information.

[joe321]

Well I have another much better solution – I use this adjustable powerbank:  http://www.ebay.com/itm/20V-Mobile-Power-Bank-UPS-6-18650-Battery-Charger-For-Laptop-Iphone-Universal-/321866773183?var=&hash=item4af0c132bf

Inside I have 6 panasonic 18650 ncr18650b (3400mAh) cells. The efficiency is very high – about 95% measured and there is virtually NO heat produced. Test here: https://translate.google.com/translate?sl=auto&tl=en&js=y&prev=_t&hl=sl&ie=UTF-8&u=http%3A%2F%2Freview-china.com%2Faliexpress%2F8488-.html&edit-text=

 

[Andy]

Well, this definitely looks interesting since EZ Book 3 PRO needs just 12V to charge it could be really good backup power supply. Is capacity of your powerbank sufficient for charging to 100%?

 

By the way, really good job with that project.

[Kalle]

Maybe you could use an old power cord to extend it? I did this with my Cube i7 charger:

 

https://imgur.com/a/2G8uT

[Matt]

Buy this 3 meter extension cable, its what I use with my ezbook 3 pro, its made of 18 gauge wire so fine for 3amp current output of charger.

Along with the approx 1m cable on the charger it gives total 4 meters length.

http://www.ebay.com/itm/1x-3m-DC-Power-3-5-x-1-35mm-Female-Jack-Male-Plug-Camera-Extension-Cord-Cable-/291269274711?hash=item43d1006c57

[Anon]

Kalle wrote:

Maybe you could use an old power cord to extend it? I did this with my Cube i7 charger: https://imgur.com/a/2G8uT

How did you get that in there? Simply by force?

I’m thinking about heating up the cable a bit for this.

[Kalle]

Anon wrote:

Kalle wrote:

Maybe you could use an old power cord to extend it? I did this with my Cube i7 charger: https://imgur.com/a/2G8uT

How did you get that in there? Simply by force? I’m thinking about heating up the cable a bit for this.

 

I grinded the 2 prongs with some sand paper. 😀 Maybe it’s possible to just push it in but it was alot easier when I sanded them. It’s not much, like 1-2mm.

[Kalle]

Matt wrote:

Buy this 3 meter extension cable, its what I use with my ezbook 3 pro, its made of 18 gauge wire so fine for 3amp current output of charger. Along with the approx 1m cable on the charger it gives total 4 meters length. http://www.ebay.com/itm/1x-3m-DC-Power-3-5-x-1-35mm-Female-Jack-Male-Plug-Camera-Extension-Cord-Cable-/291269274711?hash=item43d1006c57

 

How does it work? I was thinking of just cutting the cord and solder on another piece of cable to make it longer. But I read somewhere that this could cause the voltage to drop and thereby damaging the laptop. You know anything of this?

[Bloodr0se]

joe321 wrote:

Well I have another much better solution – I use this adjustable powerbank: http://www.ebay.com/itm/20V-Mobile-Power-Bank-UPS-6-18650-Battery-Charger-For-Laptop-Iphone-Universal-/321866773183?var=&hash=item4af0c132bf Inside I have 6 panasonic 18650 ncr18650b (3400mAh) cells. The efficiency is very high – about 95% measured and there is virtually NO heat produced. Test here: https://translate.google.com/translate?sl=auto&tl=en&js=y&prev=_t&hl=sl&ie=UTF-8&u=http%3A%2F%2Freview-china.com%2Faliexpress%2F8488-.html&edit-text=

 

Sorry to revive an old thread but does that actually work as a mobile charging solution? The item description indicates it only works as battery backup.

[maximms]

Bloodr0se wrote:

joe321 wrote:

Well I have another much better solution – I use this adjustable powerbank: http://www.ebay.com/itm/20V-Mobile-Power-Bank-UPS-6-18650-Battery-Charger-For-Laptop-Iphone-Universal-/321866773183?var=&hash=item4af0c132bf Inside I have 6 panasonic 18650 ncr18650b (3400mAh) cells. The efficiency is very high – about 95% measured and there is virtually NO heat produced. Test here: https://translate.google.com/translate?sl=auto&tl=en&js=y&prev=_t&hl=sl&ie=UTF-8&u=http%3A%2F%2Freview-china.com%2Faliexpress%2F8488-.html&edit-text=

Sorry to revive an old thread but does that actually work as a mobile charging solution? The item description indicates it only works as battery backup.

 

I have got EZBook 3 Pro with a 35.48 W*h battery (almost brand new). Here is what I use to charge it:

1. Xiaomi Power Bank 2C 20000 mah, 74 W*h capacity (almost brand new).
2. A USB to 3.5/1.35 mm DC jack cable. It should be as short as possible and the wires should be thick enough (I took an old iPad 2 USB cable)
3. A QC 2.0/3.0 trigger, as joe321 specified: aliexpress.com/item/2016-newet-arrive-QC2-0-QC3-0-quick-Charger-Trigger-Power-Bank-Test-Board-USB-Female/32686950937.html

With a full power bank, I am able to charge the laptop 1.33 times (laptop turned off, 0 to 100% and then 0 to 33%). This results in 65% efficiency. It takes around 3 hours to charge from 0 to 100%. The power bank gets just a little bit warm at the output side.

The bad part is as follows:

1. If laptop is off, it can be charged perfectly without an issue.
2. If laptop is on and battery level is 80-85% or higher, it is charged normally to 100% as well.
3. If laptop is on and battery level is under 80-85%, it is not being charged.

I assume that for high battery levels, the laptop is designed to be charged at a lower current. So “designed battery charging current” plus “working laptop consumption current” is lower than the power bank can provide; charging works. At battery levels lower than 80% “designed battery charging current” increases, and the sum of two currents offsets the maximum current that can be provided by Xiaomi 2C. When this is a case, the laptop is not charging at all (zero current at USB doctor). Though, if you, for example, turn of the screen (reduce consumption), the laptop will start charging. This is basically my assumption.

Thanks.

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