I had Lenovo T530 and it worked OK, but with half the battery life. Then I had XPS 15 and I got it working after a lot of fiddling, but with a third of battery

I had Lenovo T530 and it worked OK, but with half the battery life. Then I had XPS 15 and I got it working after a lot of fiddling, but with a third of battery life and with hidpi issues on wake up. The battery thing is really a killer for me.