????筆記本全天候續(xù)航問(wèn)題目前仍然無(wú)解,。除非你使用配備了12芯擴(kuò)展電池的惠普（HP）筆記本，要不然,，要想支撐7小時(shí)以上無(wú)異于癡人說(shuō)夢(mèng)。

????不過(guò),，蘋(píng)果（Apple）剛剛在全球開(kāi)發(fā)者大會(huì)上公布的新款MacBook Air有望打破現(xiàn)狀,。蘋(píng)果宣稱(chēng)它13英寸和11英寸版Air的續(xù)航時(shí)間分別可達(dá)12小時(shí)和9小時(shí),，均比上代多了足足4個(gè)小時(shí)——真是了不起的進(jìn)步。為了證明自己不是在吹牛,，蘋(píng)果借給了我們一臺(tái)售價(jià)為1,199美元的11英寸Air,。它的配置是1.3GHz雙核i5處理器、4GB內(nèi)存和256GB閃存,。

????筆記本的外型幾乎沒(méi)有什么變化,。對(duì)于新用戶(hù)來(lái)說(shuō)，這沒(méi)什么問(wèn)題,。因?yàn)锳ir簡(jiǎn)潔明快的線條,、微不足道的2.38磅（約合1080克）重量以及超纖薄的外形即便在三年后的今天來(lái)看也絲毫不覺(jué)得過(guò)時(shí)。內(nèi)部配置則略有升級(jí),。此前的單麥克風(fēng)升級(jí)為雙麥克風(fēng),，固態(tài)閃存的速度據(jù)說(shuō)也比上一代產(chǎn)品提高了45%。硬件上的最大的變化無(wú)疑是處理器,，全新的英特爾（Intel）第四代Haswell處理器也登臺(tái)亮相,。

????英特爾表示，Haswell處理器能有效降低能耗,，同時(shí)大幅提高圖形處理能力,，卻不會(huì)影響處理器的整體性能。Air使用了超低功率版Haswell（又稱(chēng)ULT）,，型號(hào)包括1.3GHz雙核i5和1.7GHz雙核i7等,。蘋(píng)果表示，新款產(chǎn)品的電池尺寸沒(méi)有變化,。得益于新型處理器和其它節(jié)能技術(shù)的改進(jìn),，新款A(yù)ir的續(xù)航時(shí)間得以大幅延長(zhǎng)。

????在一周的時(shí)間里,，新款11英寸MacBook Air的電池續(xù)航時(shí)間比老款長(zhǎng)得多,。老款A(yù)ir可能運(yùn)行三個(gè)小時(shí)就關(guān)機(jī)了，而今年這款省電型Air在同時(shí)運(yùn)行多個(gè)任務(wù)的情況下——開(kāi)了流媒體音樂(lè)試聽(tīng)件 Spotify,、通過(guò)Netflix Instant觀看了情景喜劇《發(fā)展受阻》（Arrested Development）一集22分鐘的劇集,，還開(kāi)著無(wú)線網(wǎng)絡(luò)且調(diào)亮了屏幕瀏覽網(wǎng)頁(yè)——平均續(xù)航時(shí)間約為5個(gè)半小時(shí)。而在情況相對(duì)簡(jiǎn)單的情況下,，比如只開(kāi)著Safari瀏覽網(wǎng)頁(yè),，用谷歌（Google）Docs編輯文檔，同時(shí)將屏幕亮度調(diào)至3/4,，Air的續(xù)航時(shí)間可長(zhǎng)達(dá)8個(gè)半小時(shí),。

????開(kāi)啟應(yīng)用程序、切換窗口以及觀看高清視頻的體驗(yàn)都比之前更順暢,，但小幅的速度提升很多人根本不會(huì)注意到,。至于英特爾所宣稱(chēng)的Haswell的圖形性能更佳,？開(kāi)著一部分花里胡哨的圖形功能玩第一人稱(chēng)解謎游戲《傳送門(mén)2》（Portal 2）是沒(méi)問(wèn)題，但假如把這些功能全部開(kāi)啟,，那就不行了,。換言之，用戶(hù)倘若將上述設(shè)置維持在均衡狀態(tài),，就可以玩更高級(jí)的游戲了,。

????試用新款11英寸MacBook Air一周后，我確信,，蘋(píng)果本次硬件升級(jí)雖然看起來(lái)微不足道,，但光憑出色的電池續(xù)航時(shí)間就足以說(shuō)服部分用戶(hù)升級(jí)或是首度購(gòu)買(mǎi)MacBook Air。這款設(shè)備在日常使用中并未能實(shí)現(xiàn)9小時(shí)續(xù)航時(shí)間,，但8.5小時(shí)的網(wǎng)頁(yè)瀏覽時(shí)間跟9小時(shí)已經(jīng)相差無(wú)幾,。雖然我希望蘋(píng)果能根據(jù)買(mǎi)家需要提供更高清屏幕的版本——目前1366×768的分辨率已經(jīng)感覺(jué)開(kāi)始有點(diǎn)不清晰了——但新款MacBook Air可謂瑕不掩瑜。它到底能不能算是商旅狂人的終極利器,？考慮到它僅僅一千美元出頭的價(jià)格,，似乎很難說(shuō)出個(gè)“不”字。（財(cái)富中文網(wǎng)）

????譯者：項(xiàng)航

????With laptops, all-day battery life remains an elusive, almost mythic, thing. Because unless it's an HP (HPQ) laptop with a protruding 12-cell battery, reaching anywhere north of seven hours of use between charges is near-impossible.

????But the new MacBook Air models, announced at WWDC, are supposed to be exceptions: Apple (AAPL) rates the 13-inch model at 12 hours of battery life and the 11-incher at nine. That's four-plus hours more than before -- a potentially serious improvement. To suss out the claim, Apple loaned us an 11-inch unit stocked with a 1.3GHz dual-core i5 processor, 4 GB of RAM, and 256 GB of flash storage, a model that sells for $1,199.

????Little has changed on the outside. For newcomers, that should be just fine, since -- let's face it -- the Air's clean lines and 2.38 lb. waif-like frame are still nice to look at, even three years later. Inside, Apple has made small tweaks. There are now two microphones instead of one, and the flash-based storage is supposedly 45% faster. The biggest change in this otherwise minor hardware upgrade is the inclusion of one of Intel's (INTC) fourth-generation Haswell processors.

????With Haswell, Intel promises better energy savings and a serious graphics bump without trading performance. The Air has an ultra-low-power version of the chip, ranging from a 1.3 GHz dual-core i5 to an optional 1.7 GHz dual-core i7, called "ULT." Apple says the battery sizes in this year's models haven't changed. It's the new processor and its improved power-conserving ways that are responsible for better battery life.

????Over the course of a week, the 11-inch Air ran much longer before it needed to be plugged in. While the old Air might run three hours before shutting down, this year's power-sipping model averaged around 5.5 hours under a mix of conditions, like streaming Spotify, watching a 22-minute episode of Arrested Development from Netflix Instant (NFLX), and browsing the web with Wi-Fi on and brightness dialed up. Separately, when we kept things simple -- browsing the web with Safari, writing in Google (GOOG) Docs, brightness dimmed to 3/4 -- the Air managed an impressive 8.5 hours.

????Opening apps, toggling through windows, and watching high-definition video is a smoother experience than before, but the small speed bump isn't one many will notice. As for Intel's claim that Haswell offers better graphics performance? The first-person puzzle game Portal 2 was solid with some of the graphics bells and whistles turned on, but much less so when we tried everything on full throttle. In other words, expect more contemporary games to be playable, provided those settings are kept medium.

????A week with the new 11-inch MacBook Air has convinced me that Apple's hardware upgrade -- minor as it may seem -- will still be enough to convince some to upgrade or buy one for the first time based on excellent battery life alone. It doesn't achieve nine hours between charges with everyday use, but 8.5 hours of web browsing is pretty close. And while I wish Apple would offer a build-to-order option for a higher-resolution screen -- the current 1,366 x 768 resolution is really starting to feel cramped -- it's a small omission on an otherwise excellent device. The ultimate road warrior's notebook? For just over a grand, it's hard to argue otherwise.