While researching Connected Standby today (see the below post) I ran across a little tool which is resident on everyone’s battery powered laptop/tablet, but they probably don’t know about it. Battery Report gives you a multitude of stats of how your device is consuming battery power.

Open the Command Prompt (CMD.EXE) and type powercfg –batteryreport. After a few seconds you will see the message below indicating that the report has been saved to your device as an HTML file.

NOTE: If you get an error stating that you need to open the Command Prompt as the Administrator, in Windows 8, right click the tile (or link) and select Run as Administrator from the options at the bottom of the screen. Interestingly, my ASUS Notebook required that I do this, but my Surface RT ran the report without any errors.  

Here is what you get. Now we know that Samsung makes the Surface RT batteries. Not sure if like that.

How about recent usage

Or a cool graph


Or how about duration by state and energy drained.

Or maybe Usage History from the day I turned on my Surface RT

Or Battery Life estimates

Notice the 509 hour Connected Standby estimate at the bottom of this chart. That’s what happened when I put my Surface RT in Airplane Mode last night. Now were talkin about battery performance.

I haven’t taken the time to really absorb all of this yet, but I know I will be using this data to analyze Connected Standby, and what it’s not doing for me.


  1. Doesn’t work on my dell latitude D630 with W8 Enterprise. I’m running command as admin but it keeps giving the error “An unexpected error condition has occurred. Unable to perform operation. You may not have permission to perform this operation.”

  2. Bummer.. I get that message on my home and office desktops, but they don’t have batteries, so I’m not surprised. Worked without any help on my Surface RT, and after enabling Admin for CMD on my ASUS Notebook, it also worked. Before I posted, a quick search indicated that this has been around since at least Win7 (possibly Vista but not sure). So I would assume most laptops today would have the capability to run the report if something in BIOS or otherwise was required to capture the data. Possibly the battery needs some kind of smart technology. Is your Dell battery OEM or a replacement?

  3. Dang. Thank you sir. Professor Simmons has been busy pondering life so no one to check my work.

    And yes, I know about Gonna. But it worked for the Men’s Warehouse. Then again, that didn’t work out too well, did it.

  4. I just tried this on my Lenovo laptop running Win7 Pro… It works. just need to modify the command slightly to

    “powercfg energy”

  5. Couldn’t get powercfg energy to run on my Surface RT, but just tried it on my ASUS notebook and it generated an interesting report. Cool stuff.

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