I've noticed that exchange is using a lot of power on the phone. Started noticing on 3.7.19 and it still remains on 3.8.16. If I look at battery consumption, Exchange services use 20% and E-mail 8%. And services has had over 1 hour keep awakes and 350 wake locks, compared to google services on 1 minute and 370 wake locks. And nothing seems to help. Tried different check frequencies and reboots.