Apple’s new iPhone 4 TV ad titled “Longer” has been airing for a couple of days now. It makes an emphasis on the great battery life, telling you that the iPhone 4 new lithium polymer battery lets you work, play, and talk longer.

I do believe the iPhone 4 battery is a great improvement from the iPhone 3GS’. I can now go through a day of average usage without having to charge the battery at every occasion I have…

In case you think the iPhone 4 battery life is not that great, you might want to check out these tips to optimize it.