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Ganty (1223066) writes "I'm trying to put together a project that can record up to ten short audio segments in reasonable quality, say an 8 KHz sampling rate. There are lots of digital voice recorders out there made by Olympus, Sony and others that can record for up to a hundred hours but when I look at individual chips to do this the selection is more limited. Futurlec for example sell chips with a maximum 16 minute recording time. So, where are the long duration voice recorder chips and who makes them?" Link to Original Source top
Ganty writes "I recently purchased a Lenovo W500 notebook and after 'downgrading' to XP and creating a dual partition I found that I had a battery life of nearly three hours using the long life battery, at this point I was a happy camper because it means that I can watch a DVD during a flight. I then tried various Linux distributions and found the battery life under FOS to be VERY disappointing with an average of 45 minutes before a warning message. After settling on Ubuntu I then spent three days trying various hardware tweaks but I only managed to increase the battery life to one and a half hours.
Unwanted services have been disabled, laptop mode has been enabled, the dual core CPU reduces speed when idle and the hard drive spins down when not needed.
Obviously Apple with their X86 hardware and BSD based OS have got it right because the Macbooks last for hours, and a stock install of MS Windows XP gives me three hours of life. Why is battery life on notebooks so poor when using Linux? Some have suggested disabling various hardware items such as bluetooth and running the screen at half brightness but XP doesn't require me to do this and still gives a reasonable battery life.