The battery performance of my HP Spectre X360 I7 processor, 15.5 Inch display is very poor. I have done a number of tests and the battery lasts no more than 4.5 hours. Even with the processor running at 6%-7% and 25% memory load the battery lasts no more than 4.5 hours. The advertised battery life is significantly higher. I have read articles that there is a fix.
Please can HP contact me and advise on way forward.
I am using a Spectre X360 13" as my loaner from HP this year and I have been pretty impressed with 8 hrs battery life.Of course a 13" with 8 gb of memory will not use as much power as a 15"with 16 gb. The last poster who asked for help ended up getting rather nasty after being informed of tweaks to help so I tread lightly on this subject now..but
I did adjust some settings I had seen recommended for longer battery life and running cooler. Such as Settings \System- Turned off notifications. In Control Panel\Hardware and Sound\Power Options> click Change plan settings> click Change advanced power settings> Processor power management- set Max processor state at 95% on battery and power.
There may be others-these are the ones I am aware of and implemented. As far as a fix from HP I do not know of an official fix. The fine print under battery life statement does have things like battery life estimate with wifi off,etc.
For "official" HP help contact them via your Support page by filling out the form. Or open HP Support Assistant installed on the X360 and click on Support tab.