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Testing Windows 7 on a Laptop ? Try this

Testing Windows 7 on a Laptop ? Try this

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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
  • 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

  • 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

  • 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

  • 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

  • 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

  • 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 !

  • 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

  • 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!

  • 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

  • brand new, out of the box Lenovo W500

    Battery:Battery Information

    Battery ID 252Panasonic42T4620

    Manufacturer Panasonic

    Serial Number 252

    Chemistry LION

    Long Term 1

    Design Capacity 84240

    Last Full Charge 80510

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