Two days of battery life was while using Sailfish rather than Android. I&#x27;d imagine part of that is due to the fact that Sailfish doesn&#x27;t have drivers for the GPS chip in the Nexus 4, and therefore would never power it up.<p>Aside from that, I still get decent battery life out of it even in Android by carefully policing what runs on it. I have very few applications on my phone that run in the background, and I don&#x27;t have the Google apps installed - I use microG instead, which is a FOSS implementation of (a subset of) Play Services.<p>I&#x27;m aware that the vast majority of users probably wouldn&#x27;t like using their phone the way I do. That said, this should make it clear that battery life is very much affected by the software you run.