nexus 5 google play services食電

有無人用nexus 5今日個google play services好食電?
唔開MON 4個鐘都無哂電
又好似sync唔到
又搞到部機好lag

我用Nexus 5 4.4.4, google play services 8.3.00
屋企人用另一個version既google play services就好正常
有無方法去返舊版先?

thanks