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How reliable is the battery data in ubuntu the power statistics?

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http://askubuntu.com – Right now the power statistics show that: Energy when full: 25.5 Wh Energy (design): 93.2 Wh And indeed the battery doesn't seem to be lasting as long as it used too. My question: Is this data reliable? Does it really indicate that I should replace the battery, or could it be the charger, laptop, or OS that is stopping the battery from fully charging? Is any way of validating the battery is indeed to blame? I'd like to be sure before shelling out 90$ for a new battery. (If it helps, the battery is a 3 year old dell 9 cell rated at 90 Wh). (HowTos)

funckax's picture
Submitted by funckax on 11/12/2012

Stories similar to How reliable is the battery data in ubuntu the power statistics?

I have a bluetooth mouse connected to my laptop.

Much to my delight (I posted the suggestion!) the mouses battery is now displayed along side the laptop's battery.

Unfortunately is is named simply "battery" in the drop down and "Laptop battery" once the power statistics windows is opened.

I've been using 12.04 on this new laptop for over a month now, but after installing recent upgrades my machine has been spontaneously shutting down when running on the battery. It will get down to around 60-70% and just turn off, then will only boot to the splash screen and shut down again.

I purchased an extended battery, a Motorola branded BP7X for a Droid 2 phone. It's rated at 3.7 volts/1820 mAh. I tested it with a volt-ohm meter and got a reading of 4.2 volts.

When I install the battery in the phone and connect the charger (phone is off), the charging graphic shows the battery is fully charged.

I'm using Ubuntu Precise with Gnome Shell on a Dell Latitude E6520 and I'm missing the battery status icon. When I run gnome-power-statistics then the battery info is displayed correctly so I'm sure Linux and Gnome can see the battery (So there is no ACPI problem).

Need more battery power 7 weeks 6 days ago

I have posted before about faster charging or reducing the battery usage but there is another option, another battery. I have tried to buy another battery or an extended batter but I am in a tight budget and the batteries extended or standard cost from $20-$40. An addition to that if i buy another battery, i should get the battery charger. So i am stumped on what to do about this. Any suggestions?

I have a Dell Inspiron 1545 and I have Ubuntu 11.10, and in my dell laptop it allow me to discharge the battery when I am using the power cable and that helps in the life of the battery, and I used to do that in Windows.

The shortcut to activate it is (FN) + (F3) but when I use it in Ubuntu it shows:

AC adapter laptop battery processor

and nothing helps in what I am looking for.

siriusb wrote:Let me clarify myself. When the battery is in place and the laptop is running from AC, sooner or later you will see that the battery is fully charged. When this fully charged status has been accomplished, charging stops and battery starts discharging (let's say from 100% to 95%) then charging starts again. I think that was the way it worked some weeks ago.

i have been hearing these 2 things about laptop battery usage:

If my battery is 100% I only have 30mins left. This are my stats:

Energy : 17,6Wh Energy when empty : 0,0Wh Energy when full : 19,3Wh Energy design : 48,8Wh Rate: 34,6W Voltage: 11,0V Time to empty 30,5minutes Percentage : 91,4% Capacity : 39,5%

My question is : Does the stats above really say that my battery just has 40% of what it should be after it leave the factory?