ThinkPad charging speed reduction

[JohannesB]

Hello everybody,

I've got a Lenovo ThinkPad L380 Yoga with an Intel Core i5-8250U, 8GB RAM, 256GB NVMe SSD running Windows 10 Education (Version 1803) with all drivers installed according to Lenovo Vantage.

I recently bought a powerbank that is able to charge devices via Power Delivery with up to 30W. Frankly, it doesn't charge my laptop, which normally draws about 40-50W when plugged in.

 

Here comes the funny thing: when I enable the setting in Vantage, which stops charging the battery as soon as its SOC is highter than a certain level, it kind of works. In this state my laptop only draws about 5-10W and does not charge the battery. To test the powerbank's maximum power output i ran the XTU stress test and charged my phone wia the laptop's USB port. The powerbank can deliver up to 33W.

 

Now comes my question:

Is it possible to reduce the laptop's charging speed down to a level where the powerbank can handle it?

I didn't find any setting to en-/disable fast charging etc.

 

Thanks in advance

Johannes

 

Edit:

I solved it!
In Lenovo Vantage there is a setting called "Airplane-Energy-Mode". As soon as i toggle that, my laptop only draws around 25W when not doing heavy workloads.

Edited November 3, 2018 by JohannesB