Microsoft investigates laptop battery drain with Windows 7
Users have reported on Microsoft's TechNet forum reductions in
battery life from two hours down to 30 minutes or less, with batteries
failing to recharge fully. The battery life appears to decline over a
short period, with another forum poster reporting the battery life dropped from 45 minutes to 15 or less over a couple of weeks.
Some Windows 7 users claim their laptop batteries have been
permanently damaged by drainage problems occurring after they installed
the new operating system. Other users report the appearance of error
messages suggesting they replace their laptop battery, even though it had been working well before the installation.
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