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Testing Windows 7 on a Laptop ? Try this

  • Artigo

One of the things which comes up from time to time is people saying “I don’t get as much battery life with this new OS as I used to … ” sometimes it is down to the configuration of the OS or its behaviour , but often it is due to the battery aging.

In Windows 7 the PowerCFG utility now sports a /energy switch, this will analyse your machine’s settings. (It needs to be run from an elevated command prompt) and on my Dell it warns me that some of the hardware devices might prevent the machine going to sleep, and that Windows can’t control the screen brightness to manage power.

More interesting though is the data towards the end of the report.

Battery:Battery Information

Battery ID 1997SMPDELL XY1234

Manufacturer: SMP

Serial Number: 1997

Chemistry: LION

Long Term :1

Design Capacity: 86580

Last Full Charge: 55178

 

Woah! Design capacity 86580 … it says on the battery that the life was 85 Watt Hours , so I’m guessing this is Milliwatt hours, and the last full charge was only 55 Watt hours ?  So my battery held 50% more when new ? I pinched this battery out of another laptop because when the original was 14 months old, and was getting about 30 minutes run time (batteries only get a 1 year warranty, and a new batteries are eye wateringly expensive) – it has had less than a year of active use – although it’s more than year old, so again out of warranty cover.

I’d be fascinated to know what numbers other people get.

Comments

  • Anonymous
    February 18, 2009
    Interesting... here is my info (fairly new Lenovo T61p) Battery:Battery Information Battery ID 2662Panasonic92P1139 Manufacturer Panasonic Serial Number 2662 Chemistry LION Long Term 1 Design Capacity 56160 Last Full Charge 54140

  • Anonymous
    February 18, 2009
    here's mine from my 2 month old asus 1000ha: Battery:Battery Information Battery ID ASUS1000H Manufacturer ASUS Serial Number   Chemistry LION Long Term 1 Design Capacity 55272 Last Full Charge 54877

  • Anonymous
    February 19, 2009
    On a Thinkpad T61P purchased last summer, Battery:Battery Information Battery ID 1019Panasonic92P1133 Manufacturer Panasonic Serial Number 1019 Chemistry LION Long Term 1 Design Capacity 84240 Last Full Charge 78680

  • Anonymous
    February 19, 2009
    Battery:Battery Information Battery ID 06901 2008/07/07Hewlett-PackardPrimary Manufacturer Hewlett-Packard Serial Number 06901 2008/07/07 Chemistry LIon Long Term 1 Design Capacity 66830 Last Full Charge 66830 7 months old HP8510w

  • Anonymous
    February 19, 2009
    wow top score! Battery ID 01824 2008/10/30Hewlett-PackardPrimary Manufacturer Hewlett-Packard Serial Number 01824 2008/10/30 Chemistry LIon Long Term 1 Design Capacity 69178 Last Full Charge 69178

  • Anonymous
    February 19, 2009
    See, I'm now tempted to load up Windows 7 just to run this report - my 3 year old Tosh M400 gives me around 4 minutes of battery life !

  • Anonymous
    February 19, 2009
    Samsung NC10 Battery:Battery Information Battery ID SAMSUNG Electronics Manufacturer SAMSUNG Electronics Serial Number   Chemistry LION Long Term 1 Design Capacity 57720 Last Full Charge 54390

  • Anonymous
    February 19, 2009
    oh dear! 18 month old Dell Vostro: Battery:Battery Information Battery ID 2786SanyoDELLJN1497 Manufacturer Sanyo Serial Number 2786 Chemistry LION Long Term 1 Design Capacity 95460 Last Full Charge 60151 And I thought I was still getting good uptime from the battery!

  • Anonymous
    February 21, 2009
    18 month old Lenovo T60 Battery:Battery Information Battery ID 1560Panasonic92P1133 Manufacturer Panasonic Serial Number 1560 Chemistry LION Long Term 1 Design Capacity 84240 Last Full Charge 67450

  • Anonymous
    February 22, 2009
    The comment has been removed