According to tests by THG, connecting a USB 2.0 device to a Core-Duo notebook causes it to lose more than one hour of battery time.
Munich (Germany) and Westlake Village (CA) – Connect any USB 2.0 device to your notebook and lose more than one hour of battery time: Tom’s Hardware Guide’s tests of a Windows-based Intel Core Duo mobile processor platform revealed a serious power consumption issue that, according to Intel, is caused by a Microsoft driver bug – a bug that has been known by Microsoft for some time, but kept from the public eye until today.
Source: Toms Hardware Guide
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