I've spent all morning trying to sync my iPhone Calendar with Google Calendar. I've synced it with CalDav but in the process it seems to have created a new calendar on the iPhone and hasn't synced any of my original iPhone calendar entries onto Google. Can I merge the two calendars on iPhone? Also I'm not sure how the two calendars communicate with each other. Do they just sync when I connect my phone to my computer or can I make them communicate whilst not connected? I'd rather they didn't connect permanently as I understand this drains the battery.