laptop-toting members of the global workforce: In an effort Dell P2928 Battery to maximize potential productivity to stratospheric levels, new portable computers with 30+ hour battery life will soon be entering the market. Who to blame? Start with Lenovo. The company unveiled the ThinkPad T420 yesterday, promising that the machine “reaches new battery life benchmarks of up to 30 hours with an extended battery.” Then feel free to re-direct some or all of your anger at HP, which today one-upped Lenovo with the EliteBook 8460p—a computer that “provides industry-leading battery life of up to 32 hours.” We talk about a lot of factors when reviewing laptops, such as processor speed, weight, and wireless capabilities, but invariably, the single most important number readers ask about is battery life. We don't blame consumers for being obsessed with it--after all, who wants their laptop to shut down in the middle of a long flight or at an important meeting? There is also much opportunity for confusion--different manufacturers measure Dell W953G Battery battery life differently, and for the most part, any battery life numbers they advertise are, to be charitable, generously stated. We've attempted to take the thumb off the scale in our standard video playback battery drain test, which generally shows shorter (but more realistic) battery life than you'd find on a list of specs from a PC maker. Size matters: The Toshiba A505 managed an impressive 4 hours and 28 minutes away from a power outlet, but at the cost of a massive 12-cell battery that sticks out like a giant kickstand from the bottom of the system. If all laptops had batteries this big, we'd see longer life everywhere--but they'd be much less portable.Low-voltage processors help achieve better battery life:The Toshiba T135 series has great battery life for a 13-incher, but uses an ultralow-voltage, less powerful AMD processor. The same case applies to the Gateway EC5809u, which has a large 15-inch screen but a Core 2 Duo ULV CPU.MacBooks lead the charts: This is due, in large part, to current MacBook Pros having extremely large, Dell 312-0831 Battery but non-removable, batteries. The new 13-inch MacBook and MacBook Pro also chose to stay with Core 2 Duo CPUs over Core i3/i5 processors, which also may have helped battery life somewhat.Netbooks last longer than anything (except an iPad): Six-hour-plus battery lives are really one of the best reasons to consider a low-cost, low-power, small-screened Netbook. Though new Atom processors have boosted battery scores even further, some Netbooks do last longer than others. Over the years, we've found the battery life of laptops can range wildly: Apple 616-0151 Battery We've seen some systems push 7 hours, and others have trouble even clearing an hour and a half. Keep in mind that battery run time isn't everything--some laptops achieve long life by tacking on gigantic extended batteries or sticking you with absurdly low-power parts. For your benefit and ours, we've gone back and cherry-picked the front-runners in battery life for 2010 laptops. Here are our discoveries, broken down across the four categories the majority of people are likely to care most about: Netbooks, 13-inch laptops, midsize laptops in the 14- to 15-inch range, and desktop replacements 16 inches and over. Alas, the days of conveniently blaming our lack of productivity on dead Apple laptop batteries are quickly drawing to a close. The EliteBook 8460p will start at $999 and be available in mid-March, while the ThinkPad T420 starts at just $779 and will also be available sometime in March. Neither price will scare off corporate purchasing agents. You have been warned. 1) the reason the batteries on the new Apple laptops are not removable is not because they reportedly should last for several years with full power (no relation whatsoever, most traditional laptop batteries last for several years with full power as well if correctly used), but reportedly because they can reportedly hold more energy as a result of the removal of ?unnecessary? latches and doors and 2) if you really believe "traditional laptop batteries" "often have to be replaced after 12 months or so" then I'm afraid you're yet another naive Mac user with serious misconceptions about PCs, because traditional laptop batteries seldom have to be replaced after 12 months or so (as a matter of fact, I don't know anyone who has ever had to replace their "traditional battery" ever and I know several people whose "traditional batteries" have aprox. 10 years and are still working fine).