Used this to power a mini projector and a switch to play mario kart on a backpacking trip. This battery provided the 110v needed to get the switch to output through the hdmi on the usb-c adapter we had. We played around 4-5 hours total, and used around ~75% of the battery if I remember correctly. This was back in february and I found it on sale at fry's for $130. We tied paracord between two trees and draped a bed sheet for a screen :)