Today I've been on WiFi all day and hit over 5 and a half hours screen on time. Normally I'm out and about on mobile data much of the day and I've been struggling to reach 4 hours screen on time. I notice today that Play Services is not on the battery list at all so clearly that is a big drainer when away from the same WiFi all day as normally it's 4th on the list. Anyone else find the same and now how to improve battery away from wifi?