[johnnyshinta]

Which sleep policy promotes better battery life? Always, only when plugged in, never?

[Dirtman16]

Always will give you longer battery life for sure; however, I believe you'll lose sync while the phone is asleep. This is the case on my Nexus 7 at least.

I don't think the phone would fall back to LTE if you had Wifi off; however, if it did, it could theoretically make battery worse. You may just have to try it out and see.

[hmfoster]

My DNA lasts much much longer with the wifi off except when I need to use it.

[hmfoster]

My DNA lasts much much longer with the WIFI off except when I need the internet connection.