Linux Advanced Power Management:
add-apt-repository ppa:linrunner/tlp apt-get update apt-get install tlp tlp-rdw tlp start
That should save your about two or three hours.
Disabling your touch screen is done via
xinput. I disabled my touchscreen and touchscreen pen whatever that is.
xinput -list and then
xinput disable 100, where 100 is the the ID you found in xinput. That saves very little normally, but may be worth a go.