Lenovo Legion Y720: Battery Life and Acoustics
Battery testing is performed using Battery Eater Pro and a custom 1080p HD video loop test we developed here at HotHardware. We conduct the tests with Windows 10 quiet hours enabled and the displays' brightness calibrated as close to 115 lux on our meters as possible. This was around the 80-percent brightness setting on the Lenovo Legion Y720.
Brightness calibration is vital to ensure a fair comparison with other notebooks in our group, since it greatly affects battery life. However, every notebook has different brightness ranges so it’s critical to rely on a light meter instead of the Windows brightness setting percentage.
Gaming notebooks aren’t exactly known for good battery life and the Lenovo Legion Y720 is no different. It manages 65 minutes in the grueling Battery Eater Pro benchmark before shutting off. Battery life is better in our video loop test, where it manages a little over 3 hours of life, which won’t let you finish a Lord of the Rings movie, but you can at least finish one of The Hobbit movies.
Lenovo keeps noise under control with the Legion Y720. There’s a noticeable hum at idle, but it’s no worse than other gaming notebooks we’ve come across. The fans ramp up when the system is under load and audible, but it isn’t obnoxious and the speakers at moderate listening levels easily drown out the noise.
The top of the keyboard and palm rest warm up during gaming sessions, but its concentrated towards the right side of the keyboard. It isn’t something that’s noticeable during gaming, because there’s very little heat around the WASD keys. So, if you’re using an external gaming mouse with the laptop keyboard, your hands won’t get too warm.