I have installed Linux on my machine and was observing the battery status. In the fields "Energy when full" it is showing as 65W, while the design energy is 69W. What is worrying me is, this number is reducing rapidly! (2 days back, it was 65.8W)

I have the U2413 monitor connected to my dell laptop via the HDMI port which uses the built in Nvida gt550 graphics card, only problem with using that port is Dell display manager does not see the monitor, is there a work around for this as I like to use DDM in auto mode?

Dell Inspiron 3721 System BIOS