Apple took a leap into the enterprise market last Friday with the release of the iPhone firmware 2.0, a free downloadable upgrade for current first-generation users and pre-loaded on the 3G iPhone. The vault was the inclusion of full native support for Microsoft’s heavily used corporate email server, Exchange. Now, business men and women around the globe would be able to get their email on their iPhone in real-time. In other words, when new email appeared in their Inbox on their Mac or PC at the office, it would also be on the iPhone. This method is termed “push” as in pushing email to your phone rather than the phone checking for new email every 15, 30, or 60 minutes per user defined settings.

Push email has its advantages, like being constantly up to date with your email, but it also has some nasty cons. Users that see a large influx of email coming in throughout the day will find heavy battery usage due to the constant pushing of messages. Instead of holding off at a minimum of every 15 minutes to get your email, now your messages are filling up your iPhone every minute a new message is sent to you. If you receive 10 messages in 15 minutes, your iPhone will have 10 active sessions with your Exchange server within those 15 minutes. Multiple this by the hours in your day of heavy traffic and you’ll notice a red battery on your iPhones screen real fast. Add the 3G iPhone to the mix and it may be at 20% by the end of lunch. Not that this problem isn’t reserved just for Exchange users, but also Apple’s new MobileMe is effected by this issue as well. Anytime high traffic email is pushed to your iPhone, your phone will be draining its battery very quickly.

There are ways around this battery dump for your iPhone. In the Settings section, you will find the third icon labeled “Fetch New Data”. Tapping this brings up various settings. The first is “Push” which lets you turn it on or off. If you have more than one push account, say your Exchange server at work and your personal MobileMe, you can tap the “Advanced” selection on the bottom of the screen and then individually disable push for each account to allow you to retain, say your work email to be pushed and not your personal mail.

Push technology is not a new problem for batteries and it’s one Apple needs to actively find a solution to. Other manufactures such a Research In Motion (BlackBerry) have made great strives in keeping the battery juiced throughout the day while still receiving lots of email. If Apple wishes to overtake the millions of BlackBerrys in the enterprise, it needs to get this battery drain plugged.