what is the difference between batteries models MA348G and MA348LL/A

i need to replace the battery of my macbook pro, indicates that the A1175 model, but is currently on the market two models that do not know what to buy if MA348G or MA348LL / A, urges that need to refer me as soon replace.

help me pleas, urgent.

Jerry

Rechargeable Battery - 15-inch MacBook Pro

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