Laptop battery issue

I have two identical model Toshiba laptops (L755 Satelite).. One has W7 and was working great with about a 5-6 hour time use on my 12-cell battery. The other has W10 but was only getting 2 1/2 hours on a cheap 6-cell battery.
So, I bought a good quality 12-cell battery and put it in my W7 laptop. I took the 12-cell battery that was on the W7 machine and moved it to the W10 machine. To my surprise, there is no improvement on the W10 machine. The battery still lasts 2-2 1/2 hours.

Any suggestions on what I should try next? I did check task manager and did not see any CPU hogs. I did check battery apps and I did not see anything glaring.

Does something have to be recalibrated. If so, how?

Mel

If I just set battery saver mode, it improves greatly.

However, I also found that disabling Cortano also works well, so that's what I did!

Thanks,

Mel