When you see your battery life dwindling away, wouldn’t you like to know exactly how much battery life you have left, besides that dreaded “20% Battery Life” warning? Well if you have an iPhone 3GS this quick tip is for you…

For the iPhone 3GS, you can now display a percentage meter right next to the traditional battery life indicator. To enable the battery life percentage meter:

1. From your iPhone home screen, tap on “Settings“.
2. Next tap on “General“.
3. Now tap on “Usage” and flip the “Battery Percentage” switch on.

Now you’ll see the percentage of available battery right next to the battery icon! If you ever want to turn it off or find that this trick is not for your, simply flip it off. Now that was a little too simple.