Does the Fetch new data button effect your battery?

setting fetch to manual means your iphone will only check for emails when you open the email app, i.e. on your command. This is the most battery efficient method as you can go as long as you like without checking emails so battery life is saved (provided you don't check all the time of course). However its not enormously practical as you will never automatically be notified of new emails. If you set fetch to automatic then set the time interval then your iphone will routinely check for emails but this will increase battery usage. The more frequently it checks, the more battery life is used. For instant notification you can set up email as Push in which emails are psuhed to the device instantly (a bit like an sms) rather than the device having to fetch the emails. This can save battery life compared to fetch or can be worse, I think it depends how many emails a day you get and how often you check them. Also there are some app's in the App Store that can notify you of emails using a push notification