Razer Blade Stealth (MX150) continues to drain battery while load even with Dell's 130W PSU.

I have an Blade 13 (RZ09-02812E71) with stock 65W power supply which constantly drains battery while gaming and rendering. Undervolting CPU and GPU done almost nothing. So, i've bought used Dell's 130W power brick (DA130PM170 rated as 20V 6.5A) and repeated my use case with it. Now system reports router login constant charge instead of discharge, but battery percentage keeps going down.

So, what I'm doing wrong? Why this %$&@ laptop keeps draining battery being undervolted and paired with 130W PSU? I know that Type-C port technically limited to 100W and only Dell's laptops may be able to use full 130W, but does 100W is not enough for this laptop?