Like the larger 17-inch MacBook Pro, the 15-inch will also feature a new lithium battery that gets up to seven hours of battery life and three times the recharges of most laptops.

像稍大点的17英寸的MacBook Pro, 15英寸的将安置一个新的锂电池，将使电池寿命长达7个小时，是大多数充电笔记本电脑使用时间的3倍。

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Apple updated the aluminium unibody MacBook Pro line to include 13-inch, 15-inch and 17-inch models featuring up to 40 per cent longer battery life.

苹果公司更新了拥有铝制机身的MacBook pro产品线，新产品包含13寸、15寸、17寸三种规格的产品，电池续航时间较以前有40%的提高。

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Apple marketing head Philip Schiller also unveiled a new version of a 15-inch MacBook Pro, which he said will feature up to seven hours of battery life.

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Optionally, customers can configure their Modbook Pro with 16GB of EnergySaverTM dual-channel RAM, offering lower power consumption and increased battery life.

ENGADGET: Baseline Modbook Pro gets its RAM, storage and screen sensitivity doubled, stays at $3,500