Microsoft have now responded to all the recent stories about Windows 7 damaging laptop batteries for users who have upgraded from Windows Vista and the response is:
every case we have been able to identify the battery being reported on was in fact in need of recommended replacement
But how can that be the case with all these reports of batteries dying when people upgraded from Vista to Windows 7?
Well, this is due to the new feature in Windows 7 that actually knows when your battery needs replacing. What it does is compares the actual full battery capacity with the original full capacity. When the actual full capacity of the battery is 40% is the original then Windows 7 will recommend that you should replace your battery (See below).
What has now become apparent is that there were a number of Windows Vista users that had already degraded batteries and didn’t realise. When they upgrade to Windows 7 they get a message that their battery is dead due the the new feature in Windows 7.
notification is new to Windows 7 and not available in Windows Vista or Windows XP.
To see Microsoft’s response from and more information about the battery issues check out http://blogs.msdn.com/e7/archive/2010/02/08/windows-7-battery-notification-messages.aspx
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