Well, I have had _some_ laptops even exceededing their advertised 10+ hrs battery life but only under a _specific_ configuration (basically the one it came with

Well, I have had _some_ laptops even exceededing their advertised 10+ hrs battery life but only under a _specific_ configuration (basically the one it came with. An OS reinstall would kill the battery life). Also, things have improved significantly in linux-land. Someone finally had time to turn off unused peripherals in the kernel and battery life doubled over night