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>> If you're wondering just how much battery juice you have left on your iPhone 3GS here's a quickie for you. You're used to seeing the battery meter icon but you can also show it off as a percentage. This is iPhone 3GS only so all you guys have to do is go to your settings, and then general and then usage and you'll see the battery percentage option. Switch it to on and now you know exactly how much juice you have. I'm Brian Tong for cnet.com. I told you it was a quickie--use it wisely.
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