Games are making random FPS drops on laptop

[IgnacioLuchaLibreNacho]

I play Black Ops Zombies or L4D2 it drops randomly from 60 to 5, which is annoying. When I re-plugin the charger, it goes back to normal for a short time. Of course on L4D I get that infamous Source Stutter that lasts for a bit when plug in the charger. I'd appreciate help, I've had enough of this bs
Intel(R) Core(TM) i7-9750H cpu 2.60GHz

Edit: Let me be clear, the charger is in when this occurs, thought I typed that above guess not. What I meant to type was when I unplug, and re-plugin during the event. However thanks for the suggestions

[rawWwRrr]

You don't unplug the laptop.

[Dr.Shadowds 🐉]

Sounds like your laptop goes into power saving mode, or does something when you're not plug in as most laptops does this to save power, either have to mainly change the settings to always allow high performance, which will drain your battery faster, or just keep your laptop plug if you don't want to mess with the settings.

[crunchyfrog]

Yup, this sounds like the usual power savings settings all wrong.

When you get a laptop and it sets up, the default settings for power usage are always set to save power as much as possible when on battery. Right click on the power icon in the bottom right of your taskbar, and choose power settings.

If you plan on using battery to play games, then you need to whack the settings up to max. Likewise, check your settings for when it's plugged in too, because they aren't necessarily at max either.

Of course, you won't get the same battery life from using it this way, that's the trade off.

[Iceira]

It's standard unplug powercore setting's and you need to edit with powercore settings only
and never play 3D games ( or hignend games balance mode is reduce speed ) with out Full performance or game mode or what its called seen plenty of names like Entertain mode.

ps.
intel boost cant help you in balance mode 2.60GHz is still apox 20% lesser performance if you can trust the dot's, its just graphic, and do not underestimate some game requiements is 3.0ghz
and then you will see this problewm or worse laptop just exit to desktop with no error msg.

and why even charge on laptop battery, that only drain laptop battery even faster.

do not edit settings with no powercore attached, because that can end up with 5minute uptime and pc shutdown anyway. ( and not the firsttime i have seen brownout and then its nice to see laptop battery has as much uptime as possible. ) sure most dont make such mistake , but there is always one that edit wrong settings.

and the other 3 above me already point out, valid info.

and watchout for preinstall app's that is not need and waste laptop resource.
we are many that know this, but ( laptop owner most know windows resource manager and keep eye on it. its to late then you are on battery, to deal with it then it just drain all.