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trenzterra
Punch Card
Posts: 31
Registered: ‎08-30-2018
Location: SG
Views: 1,467
Message 11 of 50

Re: Lenovo c940 - Charging via USB-C?

Thanks for the clarification and this is upsetting to hear. I briefly had a S740 but am considering the C940 instead. the S740 has a round barrel charge tip but is also able to charge using my Aukey PA-Y10, which is a 46W PD charger with PPS support.

 

Do you have the exact model of the Anker and Innergie?

Qyygle
Serial Port
Posts: 23
Registered: ‎11-05-2019
Location: US
Views: 1,452
Message 12 of 50

Re: Lenovo c940 - Charging via USB-C?

Innergie 60C, and an Anker Powerport Speed 1 (A2015). Both put out up to 20V-3A.

 

A PWR+ 65W universal usb-c charger does charge however, it outputs at the same levels as the oem charger. I might try to pick up some 65W or 87W hubs over the holiday weekend if they're on sale to test.

Johnli
Paper Tape
Posts: 5
Registered: ‎11-26-2019
Location: US
Views: 1,391
Message 13 of 50

Re: Lenovo c940 - Charging via USB-C?

Not sure if this helps, here's the charger that came with my C940 14".  Takes 1-2 hours to fully charge, after I reach about 40% battery status.

 

I am considering docking stations, so would be interested in knowing any required specs to charge from the dock station.  From these posts, sounds like I can't just use my C940 charger with any docking station.

65972A1A-88E6-48DF-AD6E-E84F3F8F4CD5.jpegCharger that came with my C940 14”

BaZgA
Paper Tape
Posts: 2
Registered: ‎11-17-2014
Location: HR
Views: 1,361
Message 14 of 50

Re: Lenovo c940 - Charging via USB-C?

I just bought ICY BOX IB-DK2301-C with USB-C PD up to 85W and it does not charge Smiley Sad

I have yoga C940 14"

 

 

bobbyhong
Fanfold Paper
Posts: 16
Registered: ‎01-20-2015
Location: WF
Views: 1,354
Message 15 of 50

Re: Lenovo c940 - Charging via USB-C?

It's weird how everyone has a different experience here. I have a C940 14 UHD and I have used three different 65w USB-C wall chargers (Acer, Huawei and Verbatim brand) and all of them work perfectly. I have also used two different 87w Macbook Pro chargers. Same deal, works fine. I have tested Xiaomi's 20000 mah Powerbank 3 (45w) charger which does 20v @ 2.2A and that also charges my C940 fine. I've also used a 65w 20000mah powerbank (not sure of the brand) and that works fine too. The only thing that is weird out of all of this testing is that they all seem to charge at the same rate (around 16,500 mW as shown in BatteryBar and Hwinfo) for ALL the different chargers and powerbanks, regardless whether 45, 65 or 87w.

Renzo4000
Serial Port
Posts: 15
Registered: ‎11-11-2019
Location: NL
Views: 1,346
Message 16 of 50

Re: Lenovo c940 - Charging via USB-C?

Can it be that the option "fast charging" needs to be off (in Lenovo Vantage) to charge with third party chargers?

 

I'm not sure ofcourse because i have the 15" model which can't charge over USB C which is a pitty .... still don't understand why Lenovo disabled this function. I can understand that the 15" model with a Gerforce 1650 is more power hungry but I don't expect that it needs to keep up charging under full load, but at least make it "slow charging" possible so i can use my dockingstation at home and at work. The 135watt power brick is a huge device to bring along all the time.

Qyygle
Serial Port
Posts: 23
Registered: ‎11-05-2019
Location: US
Views: 1,344
Message 17 of 50

Re: Lenovo c940 - Charging via USB-C?

Interesting. I have my original hunch regarding the 65w chargers, but you said the 45w powerbank works too. Interesting...

Perhaps its something about the amp delivery of the 45 vs 60? So strange.

trenzterra
Punch Card
Posts: 31
Registered: ‎08-30-2018
Location: SG
Views: 1,339
Message 18 of 50

Re: Lenovo c940 - Charging via USB-C?

I managed to try on my 30W Aukey power bank at a Lenovo store and the C940 charges just fine too.

bobbyhong
Fanfold Paper
Posts: 16
Registered: ‎01-20-2015
Location: WF
Views: 1,337
Message 19 of 50

Re: Lenovo c940 - Charging via USB-C?

I actually only got the Xiaomi Powerbank 3 today. Didn't actually buy it for the C940 but thought what the hell I'll give it a try and it surprisingly worked. I've never tried a 45w wall plug though but really that should also work if it can deliver consistent 20v @ 2.2A

There is no "fast charging" option in my Vantage so can't really say whether this would make a difference or not. I'm on Win 10 build 19033.1, version 2004 if that makes a difference.

BaZgA
Paper Tape
Posts: 2
Registered: ‎11-17-2014
Location: HR
Views: 1,315
Message 20 of 50

Re: Lenovo c940 - Charging via USB-C?

https://www.raidsonic.de/products/adapter_multidocking/multi_docking/index_en.php?we_objectID=5019#p...

 

This is a Docking station, not a charger. Obviously chargers work fine but docking stations not so.

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