While going through a big stack of catalogs that came in my mail today I happened upon a catalog from Dell. unlike most people I receive two different catalogs from Dell, I receive the consumer and business catalogs. It was the business catalog that arrived and right on the front cover was a special deal on a laptop with 19 hours of battery life

19 Hours of Battery Life?

Battery life results based on Dell lab testing using MobileMark 2007 Benchmark. 19 hour battery life resulted from testing a Dell Latitude E6400 configured with solid state drive, Mobile IntelĀ® GMA 4500MHD graphics, 9-cell primary battery, and 12-cell slice battery. Battery life varies by configuration, operating conditions, and other factors. Maximum battery capacity decreases with time and use.

Naturally all that extra power comes at a price and I'm not just talking about money. The 9-cell battery sticks out the back of the machine and the 12-cell slice battery goes on the bottom. Without the extra power the base machine weighs about 4.3 lbs.

Who would want such a thing? Business travelers.

Business travelers have long purchased laptops that offered secondary battery bays. Bays that are hot swappable and allow for either a battery or an ROM drive to be placed within.


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I talked with a customer service rep from Dell and he told me that the 12-cell slice battery drains first and is hot-swappable. The 9-cell (or 6-cell) is not hot swappable.

As for weight. The machine weighs 4.3 lbs with the 6-cell, 5.3 lbs with the 9-cell and 6.6 lbs with the 9-cell and 12-cell slice installed.