Legion Y740, 4 to 5 hours battery life under use. After updating bios, enabling hybrid graphics mode, undervolting cpu by 155 mV and setting screen brightness to 50%. : r/Lenovo
Lenovo Legion Y740 Gaming Laptop Deep Dive Review With Benchmarks - Page 4 | HotHardware
Lenovo Legion Y740 review: A laptop built for the future has a few issues in the here and now | PCWorld