Significant Performance Drop on Battery

I can't figure out what setting to change to fix this problem. I have the Inspiron 7577. It performs really well when plugged in, but when I unplug it, the CPU gets throttled down to 0.80 GHz. That's absolutely insane, and nearly unusable. I have tried contacting support, but they insist nothing looks out of the ordinary and that the CPU will profile the performance demanded of it, implying that I must not be doing anything taxing on the CPU.

The issue seems to clearly be that it is being throttled on battery. For example, if I load up Unity for game development, it works really well and smoothly. The CPU is allowed to go to whatever level it wants/needs, and I am able to do my work. However, the moment I unplug the power cable, it throttles to 0.80 GHz (0.79 GHz, actually, and the multipliers for all cores are brought down to x8). Unity gets sluggish, and I can't develop anymore.

Are there any suggestions on how to fix this? I am immobilized when it throttles. I have tried:

• Updating the drivers
• Updating the BIOS
• Setting the Windows power profile to High Performance. I had to add this profile to the list, as it was not available by default.
• Modifying the Windows power settings to set the minimum CPU state to 100% when on battery, just in case.
• Going into BIOS and toggling the C-states and Speed Shift.

Any help would be wonderful. My "fix" is to always remain plugged in, but what is the point of a laptop with a battery if it is unusable when on battery??

Thanks!
Sean