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Regardless of how stacked its specs are, a portable computer is futile on the off chance that it cant hold a charge. Luckily, there are a lot of record books that go all the way. Utilizing our World Laptops Battery Test (nonstop Web surfing over Wi-Fi), weve distinguished the 5 longest-enduring record books available. Were talking anywhere in the range of 9 hours to more than 20 hours of persistence, which ought to more than suffice for that crosscountry battle, taxing day of gatherings or numerous, consecutive classes. 

Lenovos X200 Thinkpad arrangement is synonymous with versatile benefit, and the X240 gives you a chance to accomplish like never before without hurrying to the closest outlet. This lightweight portable computers inherent battery gives a decent 7 hours and 40 minutes of juice, which extends to an astounding 20 hours and 28 minutes when you overhaul from its 3-cell to its 6-cell battery. This persistence is the most weve ever gotten from a portable computer without a sheet battery joined to the base, and makes the X240 the ideal profit friend.

One of our most loved business journals, the Lenovo Thinkpad T440s has the battery life to go down its solid fourth-era Intel Core execution and dynamic presentation. This comfortable smart phone can be designed with a 3-cell battery that endures an above-normal 7 hours, yet you ought to use the additional $5 for the discretionary 6-cell battery that multiplies that life to 14 hours and 36 minutes. The T440s additionally has an extra 3-cell inner battery, so you can swap out battery packs without your gadget going dead.

The most recent Macbook Air keeps the same smooth plan as its antecedent and includes a zippier Core i5 processor for $100 less. The best part? Regardless you get wonderful battery life. The 13-inch Air endured a long 12 hours and 20 minutes on the world laptop battery test. Include a comfortable console and touchpad and simple to-utilize OS X Mavericks, and its not difficult to see why this $999 Air is our most loved ultraportable worth.

Acers Travelmate P645 is a great IT powerhouse with the continuance to match. Checking in at 9 hours and 46 minutes, the smooth P645 outlived a large portion of its thin-and-light contenders with all that could possibly be needed juice to traverse the workday. The P645 comes stacked with security characteristics, and its fortitude gives business clients much more significant serenity when working remotely.

The vigorous Macbook Pro 13-inch with Retina show developed significantly stronger for 2014, and Apple didnt need to relinquish battery life for included force. This up-to-date record book endured 10 hours and 44 minutes on our battery test- -an hour longer than the 2013 rendition -giving a lot of juice to photograph altering, feature visiting with companions or using late nights in the studio with Garageband.