Update to Waze for Windows Phone 8 fixes battery issues
And fixed it has been. The latest update to Waze in the Windows Phone Store includes improved battery life and some various bug fixes. While that takes care of a big problem that prevented Windows Phone 8 users from enjoying the traffic and navigation information they were receiving from the app, it still is missing a couple of features from the iOS and Android version of the app. Perhaps the next update will add the calendar and Facebook integration found on the latter two versions of Waze.
source: Waze via Engadget