@jezek I have FP2 on Stable channel (so 5.1). I took the charger out yesterday evening to test, it's now a bit over 50%. Wifi was on. I didn't use it much, mostly looking at time occasionally and a bit of web browsing, but not much (maybe couple of minutes total).
Two weekends ago I managed to drain the battery in an hour or so I think, but I was constantly using the camera, so that's prob expected.
So yes, I'd say it's over 24h battery lifetime (assuming "normal" usage).