There's actually a lot of debate on the internet about whether 'push' or 'fetch' drains your battery more quickly, but Apple's own web site suggests using the Fetch option to maximise battery life, so that's good enough for us. In any event, your wifi usage and screen brightness probably have far more effect on battery life than the push and fetch options, so this isn't something that you need to worry about too much.
There are other apps that can use push technology too, although these apps may sometimes refer to it as 'background refresh' instead. The BBC News app has options for both background refresh and notifications, so that it can give you an on-screen notification if a major news story breaks. Plenty of other apps provide similar options, covering everything from stock prices to special offers at your local supermarket, so you'll need to decide how much of this information you really want to see when you're choosing settings for all your apps.
To be continued...
Sign up for CIO Asia eNewsletters.