Dell introduced business laptops that can run for as long as 19 hours on a single charge.
Dell Latitude E6400 runs for as much as 10 hours on a single nine-cell battery, and an additional battery that snaps on to the bottom of the laptop adds as much as nine hours of battery life
According to announced specifications, The nine-cell battery configuration on the 14.1-inch Latitude E6400 provides 10 hours of battery life and by using Dell’s PowerSlice technology, that can be extended to 19 hours.