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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Mani1 who wrote (73504)	9/30/1999 6:17:00 AM
From: Bill Jackson	Respond to of 1573075

Mani, If you cut the voltage by 10% that will reduce the device current by 10% and the device wattage by 20%. This 10% reduction in battery curent will extend the charge duration by about 10%. If the system has what is called a "pass regulator" then cutting voltage alone will not extend the battery charge as it just changes the proportion of the battery voltage thrown away in the pass regulator. If it has a PWM voltage regulator then a lower voltage at the same current can produce a net saving. Modern laptops may have this feature and it will exrend the battery life. Most desktops use AC power so they avoid the extra expense and just use a set of heat sinks on the mobo and throw away the excess heat. Bill