Why does my laptop become less powerful than when it was plugged in? - 1

I have a lenovo y510p with gt 755m sli and 16 gb of ram. Whenever I unplug my laptop, the games i play suddenly drop more than twice. How do i prevent this?

Mainly because of the default power settings. If you have Lenovo energy management software try to put it in "Energy Star" mode. If not try to mess with windows power settings and if you have no experience with it look it up then mess with windows settings

Control panel-> power options. Within this section you have the option to change your power plan settings. Review and update this section. Issue should be a simple fix.