You are probably ok for another year, but batteries can go at any time. Just have some jumper cables in the car. If you are really worried about it, you could just replace it.
Another thing you could do would take it to a shop that can check the status of the battery. Such as: how much juice it can hold, does it need a charge, how much life let, get their opinion, and what not.

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Eazy wit da Haaahdwaire!!!!