MetropleX that's good to know! I'll try airplane mode tonight. I don't need any connection to cellular towers/WiFi at night so that would be fine. My device remains untouched for about 7-8 hours. Would using battery saver also help? It I click on it it says 'using battery saver will prevent some apps from sending notifications and restrict background activity'. Its not like I need notifications in the middle of the night anyway, as my phone is on vibrate and DND.