Laptop battery liftime from Dell specs?

Posted by user26535 on Super User See other posts from Super User or by user26535
Published on 2010-01-30T12:16:10Z Indexed on 2010/04/10 5:03 UTC
Read the original article Hit count: 533

Filed under:

dell

|

battery

|

battery-life

|

lithum-ion

Question: When I buy a Dell Laptop, I get the following choice for battery:
(Lithium-Ion main battery with X cells and Y Wh [included in price/at additional $]

Lithium-Ionen-Hauptakku mit 4 Zellen und 24 Wh [Im Preis enthalten]

Lithium-Ionen-Hauptakku mit 9 Zellen und 85 Wh [zuzgl. CHF 120.01]

Lithium-Ionen-Hauptakku mit 6 Zellen und 46 Wh [zuzgl. CHF 30.00

I figured that I can calculate that a 86 Wh offers +254% of the 24 Wh lifetime, but...
Is there any way to calculate to what battery time this amounts in hours ?
I mean how many hours will the 24 Wh last (at normal operation - eg. writing a document - not watching video), else the +254% is a pretty useless number...
Also anybody knows whether 4 cells means 4 times 24 Wh, or 24 Wh in total?

© Super User or respective owner

Related posts about dell

Dell Inspiron 14z laptop vs Dell inspiron 14z ultrabook

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
Just wanted to know if both of these are fully compatible with Ubuntu? If only specific versions of Ubuntu are compatible, then which ones? http://www.dell.com/ca/p/inspiron-14z-5423/pd http://www.dell.com/ca/p/inspiron-n411z/pd Matters I am more concerned about are: 1) Affect on battery life… >>> More
Dell Dell E2009W monitor not detected

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have an issue with my monitor. I just installed Ubuntu 11.10, but the monitor that is plugged in doesn't appear anywhere. And by doesn't appear, I mean that in the "Displays" menu, it doesn't even appear as "Unknown", I just have my screen that appears and nothing else. It is connected through… >>> More
Imaging Dell OEM Windows 7 install onto other Dell laptops purchased

as seen on Super User - Search for 'Super User'
We have ordered 70 dell laptops directly from dell. We are wondering if we can take the existing OEM install of windows on one of the laptops, add some files and then deploy that image to the rest of the laptops. We are trying to avoid making an image from the ground up. I would imagine since we… >>> More
Dell PSU Compatibility: Dell Inspiron 530 (Desktop)

as seen on Super User - Search for 'Super User'
I have an Inspiron 530 with a stock PSU. I need to upgrade it to meet my video card's needs (AMD HD6770), which demands at least 450W, to potentially fix BSODs with the latest version of the drivers (so claims AMD support). Now, I've heard conflicting reports about whether Dell uses special/proprietary… >>> More
Failure connecting to Dell MD3200i from XenServer 6.2 pool

as seen on Server Fault - Search for 'Server Fault'
This question also asked at Citrix Forums http://forums.citrix.com/thread.jspa?threadID=332289 I have a MD3200i that is currently working fine with my Xen5.6 pool, but I cannot get a connection to the new 6.2 pool to work. I previously had a problem with a 6.0 upgrade (which is why the old pool is… >>> More

Related posts about battery

Regardless of battery charge, when unplugged Ubuntu displays critical battery message and hibernates

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
Regardless of battery charge, when unplugged Ubuntu displays critical battery message and hibernates. I can only seem to change it to either shutdown or hibernate. This does not happen when using windows 7 on the same computer. Windows 7 gives a good few hours on a full charge indicating that it… >>> More
Ubuntu 12.10 is reading mouse battery as a laptop battery

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
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. The details… >>> More
The battery indicator& Power setting panel shows wrong battery state

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
My laptop is Thinkpad E420 with Ubuntu 12.04 64-bit installed, the kernel version is 3.2.0-33-generic. I have set the battery threshold as 60% via windows7. It seems that the threshold auto effected in Ubuntu. However, there are some problems of the battery indicator's state. I'll list some information… >>> More
To have a long life with the battery it has to be separated from the Laptop after each use

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
To have a long life with the battery it has to be separated from the Laptop after each use Developing a Laptop and concern about it's battery life Don't be concerned follow this advice how to deal with your Laptop battery. A fresh power supply of your Laptop can be purchased in a very low charge… >>> More
How to Calibrate HP Laptop Battery

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
Calibrating the HP Laptop Battery This document pertains to HP Notebook PCs with Windows 7 and Vista. Calibrating the laptop battery Calibrating the battery means recharging the battery to its maximum capacity and resetting the battery gauge to display the level of charge accurately. The Windows… >>> More