Last week, Apple engineers were reportedly looking into complaints about unexplained iPhone 4S battery drain. On Wednesday, the company officially acknowledged the problem and said they are currently working on a fix.

Apple told Jim Dalrymple of The Loop:

“A small number of customers have reported lower than expected battery life on iOS 5 devices. We have found a few bugs that are affecting battery life and we will release a software update to address those in a few weeks.”

Google has officially launched its Gmail App for the iPhone, iPad and iPod touch. The new "time-saving" app offers notification badges for new messages, easier message searching, threaded conversations, and e-mail address auto-complete.

There is also a Priority Inbox for important messages and a labeling system/spam filter. A simple swipe down refreshes your inbox, and a right swipe quickly reveals your labeled e-mails. The iPad version offers a split view for reading your messages while viewing your inbox.

Google gets credit for Gmail's sharp mobile web interface on the iPhone, however despite several native apps available from the company we have yet to see Gmail for iOS. This could all be set to change, as a Gmail app is said to be on its way to iTunes. Google has not made any official comment about a possible iPhone and iPad mail application, but observers think the time is right considering Apple's launch of iOS 5 Notification Center.

Sources have told tech reporter MG Siegler that the Gmail iOS app has already been submitted for review and should be released shortly. Besides Gmail's powerful search capabilities, push notifications would make the app infinitely more useful for iPhone owners. Unfortunately reading Gmail on the iPhone currently does not provide a push option.

Missing the days of record players, cassette tapes and compact discs? The days of the iPod may even be numbered now that Apple has changed the iPod app icon in iOS 5. If you're looking for a dose of nostalgia, here are some iPhone apps that will make your music player a little more interesting.

First off is AirCassette, which brings back the Sony Walkman and homemade mix tapes for $1.99. AirCassette is the most versatile of the bunch, and has graphics simulating several different blank tapes to choose from.

Apple is currently investigating reported battery life problems experienced by iPhone 4S users. There are many tips and tricks floating around about how to extent battery life on your iPhone, but you shouldn't have to shut down most of the useful functions of your device to get battery life back. Normally these problems are due to specific bugs or corrupted files in the iPhone firmware or applications (this happened with the iPhone 4.1 update).

Apple will often issue a fix in the next iOS update, however in the meantime iPhone users must do what they can to solve the problem or deal with abbreviated battery time. There are many general tips and tricks that can improve battery life on your iPhone, but these involve much compromise and will switch off many features of your iPhone. In the past specific apps such as Ping and Game Center were pegged as culprits. The flood of feedback from users of the iPhone 4S point to these top 5 fixes for short iPhone 4S battery life: