In an effort to maximize battery life I'm trying to decide whether to use push or fetch. Does push constantly check for new mail every second? or is it simply just when a new email arrives in your inbox it is pushed to your iphone (using imap gmail)? if that is the case it may be more battery efficient than fetch. if you have any more extensive knowledge on these two features please share because my knowledge is limited to what gizmodo posted about maximizing battery life.