Like many (most?) others, I've been suffering from very poor battery life on my Lumia 920 ever since the upgrade to 8.1. It went from lasting nearly two days to only about 12 hours with similar usage.
My guess is that the new Wi-Fi Sense features might be one of the factors at play here. Previously (in 8.0) we had the option to choose weather the phone should keep the Wi-Fi connection alive even when the screen is off. And I, like most others preferred it to be off when I wasn't using the device and resort to mobile data for background tasks. This option seems to be gone now in 8.1 and my phone's Wi-Fi is always on despite me not even turning the screen on for over an hour.
While it might not be a the single biggest reason for the massive battery drain, it certainly is a factor. If anyone has ideas about disabling the new functionality and reverting to the old method, I'm all ears.
My guess is that the new Wi-Fi Sense features might be one of the factors at play here. Previously (in 8.0) we had the option to choose weather the phone should keep the Wi-Fi connection alive even when the screen is off. And I, like most others preferred it to be off when I wasn't using the device and resort to mobile data for background tasks. This option seems to be gone now in 8.1 and my phone's Wi-Fi is always on despite me not even turning the screen on for over an hour.
While it might not be a the single biggest reason for the massive battery drain, it certainly is a factor. If anyone has ideas about disabling the new functionality and reverting to the old method, I'm all ears.