My AMD Radeon R9 M375 Gpu won't activate on battery?

Lenovo z51-70 has this gpu and I have installed all the drivers and i have change the game's profile to high performance even. However the fps is too low and on battery the gpu gives nice fps. What should i do?

Download Iobit Game Booster and add your games to there and it will increase fps and such.
Turn off high performance and play on medium settings. Put everything on medium

Gaming laptops do not tend to allow the graphics card to operate on battery power.
They are designed to use on AC power. Towers work better on AC power, but laptops are bought to move them around easier.

An R9 M375 is a 75 watt card.
The laptop has a 41 watt-hour battery.
With everything else running, you would probably run 80 watts an hour. Full to empty battery if gaming with R9 M375 is 30 minutes, and there are only a certain number of charge cycles before the battery needs replacing.

Any laptop that has both integrated and a graphics card tends to not allow you to kill batteries.

You are supposed to know that before you buy a laptop for gaming.

Christopher is correct to use Razor Cortex or Iobit Game Booster, have 8gb system ram, run integrated graphics, and keep settings low.