My iPhone 4s dies at 18%-25% battery

I have updated my iPhone 4s to iOS 6 about the week it came out… And now (a month later) it dies about 18% to 25% battery! What do i do! My phone was jail broken about a year ago but I took it off. I also just thought the update would take the jailbreak TOTALLY away. What do i do?

You need your battery to be replaced

Take it to an apple store tos ee if they can put a new battery in it. Never really heard of that happening but with jailbreaking who knows.

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