Performance drop on removal from charging.

[76561198023534575]

My Lenovo Ideapad Y500 (i7-3632 QM; GT 750M; 8GB RAM)
started developing a problem with performance with and without charging.
I can easily run DotA2 and such at max graphics, rendering with around 100+ fps average, when the laptop is in charging; the moment I take it out of charging, the performance drops heavily, to around 20+ fps. The same thing occurs in my other games (Skyrim, BO2, RO2,etc).
The low performance stays until I start charging my laptop again.
My Win8 battery settings are - Balanced, Optimized Battery Health, Hard Disk power saver mode.
Is there any solution to this or will I have to contact the manufacturer for faulty hardware?
Thank you.

[_I_]

perfectly normal

notebooks will switch to power save mode when not charging

change it to the plan to performance mode, it will help, but your battery will not last as long

[Pant]

I have a similar problem with my laptop but it isn't as extreme as yours, when I unplug my laptop I get roughly a 20% decrease in performance. Even when I set my power settings to maximum performance it didn't help much. My theory is that the laptop can't pull the power from the battery quickly enough so it cuts the performance.

[76561198023534575]

I change it to 'High-Performance' as well, when I take it out of charging, but the increase is barely 40-50 or so fps in dota 2 and seemingly less in the other games. If it is as Crunchbite says, is there no other option but to lower the rendering/texture details in game?

[SHON]

ITS PERFECTLY NORMAL.

When you run laptops just off battery the system will go into power save mode, meaning you won't get full power when on battery.

Always game with them plugged in to get full power.