No matter how stacked its specs are, a laptop is useless if it can’t hold a charge. Fortunately, there are plenty of notebooks that go the distance. Using our Laptop Mag Battery Test (continuous Web surfing over Wi-Fi), we’ve identified the 10 longest-lasting notebooks on the market. We’re talking anywhere from 9 hours to more than 20 hours of endurance, which should more than suffice for that cross-country fight, long day of meetings or multiple, back-to-back classes.
Lenovo's X200 ThinkPad series is synonymous with portable productivity, and the X240 lets you get more done than ever without rushing to the nearest outlet. This lightweight laptop's built-in battery provides a good 7 hours and 40 minutes of juice, which stretches to a whopping 20 hours and 28 minutes when you upgrade from its 3-cell to its 6-cell battery. This endurance is the most we've ever gotten from a laptop without a sheet battery attached to the bottom, and makes the X240 the perfect productivity companion.
One of our favorite business notebooks, the Lenovo ThinkPad T440s has the battery life to back up its strong fourth-generation Intel Core performance and vibrant display. This comfy laptop can be configured with a 3-cell battery that lasts an above-average 7 hours, but you should spend the extra $5 for the optional 6-cell battery that more than doubles that life to 14 hours and 36 minutes. The T440s also has an additional 3-cell internal battery, so you can swap out battery packs without your device going dead.
The latest MacBook Air keeps the same sleek design as its predecessor and adds a zippier Core i5 processor for $100 less. The best part? You still get awesome battery life. The 13-inch Air lasted a very long 12 hours and 20 minutes on the Laptop Mag battery test. Add in a comfy keyboard and touchpad and easy-to-use OS X Mavericks, and it's easy to see why this $999 Air is our favorite ultraportable value.
Acer's TravelMate P645 is an impressive IT powerhouse with the endurance to match. Clocking in at 9 hours and 46 minutes, the sleek P645 outlasted many of its thin-and-light competitors with more than enough juice to get through the workday. The P645 comes loaded with security features, and its staying power gives business users even more peace of mind when working remotely.
The robust MacBook Pro 13-inch with Retina display grew even stronger for 2014, and Apple didn't have to sacrifice battery life for added power. This stylish notebook lasted 10 hours and 44 minutes on our battery test--an hour longer than the 2013 version--providing plenty of juice for photo editing, video chatting with friends or spending late nights in the studio with GarageBand.
Armed with a 4-cell lithium-ion battery, the lightweight Toshiba Tecra Z40 gave us a rock-solid 9 hours and 28 minutes of endurance on our test. The Z40's battery life bests the thin-and-light average by a long shot, and with its durable build, this is one of the best business notebooks to bring on a big trip.
The Dell Inspiron 15 7000 brings a fresh look to the Inspiron line while keeping a focus on fast performance and, most importantly, long battery life. This sexy and affordable mainstream notebook provided us with 9 hours and 26 minutes of Wi-Fi Web surfing, making it an ideal companion for working and playing on the go.
The Dell XPS 12's unique flip-screen design makes it one of the most eye-catching notebooks around, but that's not the only reason to pick one up. This stylish hybrid boasts 9 hours and 24 minutes of battery life, which allows you to take advantage of its gorgeous display and speedy performance without constantly plugging in.
With its useful Control Zone touchpad; attractive, thin build; and sharp display, the HP Spectre 13 Ultrabook has no shortage of alluring features. Its endurance is no exception, as the Spectre 13's 4-cell battery and Core i5 processor combined to give us 9 hours and 4 minutes of unplugged use.
One of the best Apple laptop values ever, the updated 11-inch MacBook Air costs just $899 and includes a faster new Core i5 processor running at 1.4-GHz. With a speedy SSD under the hood, this is one of the zippiest ultraportables available. But the new Air also boasts fantastic endurance; this 2.4-pound powerhouse lasted a strong 9 hours and 19 minutes on our rundown test.