DELL Alienware M15x: how much hours of battery life?*

aufgeladen3 · 02-20-2017, 03:46 AM

Well I bought*a DELL Alienware M15x battery*few days ago.Now I want to know how to test its life?*

How to be considered normal?

dave@burn-it.co.uk · 02-20-2017, 08:02 AM

Look at "Battery University"

hydrurga · 02-20-2017, 11:46 AM

Hi, aufgeladen3, and welcome to LQ.

The acpi command is quite useful. You have given no indication of which Linux distro (and version) you're using but acpi can be installed from the Ubuntu repos and may also be available in other repos.

acpi -bi shows e.g.

Code:

Battery 0: Discharging, 73%, 02:55:30 remaining
Battery 0: design capacity 4400 mAh, last full capacity 4064 mAh = 92%

You could also look at acpitools (also in the Ubuntu repos), but I've found that it doesn't report the remaining capacity and time, saying that the remaining capacity is "unknown" - it may work on your system however.

If you want to do so, we would welcome you introducing yourself on the Member Intro thread:

https://www.linuxquestions.org/quest...mber-intro-24/

TB0ne · 02-22-2017, 07:55 AM

Quote:

Originally Posted by aufgeladen3

Well I bought*a DELL Alienware M15x battery*few days ago.Now I want to know how to test its life?* How to be considered normal?

To add to what hydrurga has said, there's no real way to know...because 'normal' will depend on what you actually doing/running on the system, and how you're using it.

If you're powering two external USB hard drives, doing some 3D animation in Blender, and have your web browser up with a dozen tabs, and the screen on max brightness, your battery life will be MUCH different than someone who dimmed the screen and is only typing a document. Your mileage may vary. Best way to even have a thumbnail view of the 'normal', is to look at the manual/docs on your system, and see what it claims. Then get a real-life estimate by unplugging the thing and just using it normally.

jefro · 02-22-2017, 02:40 PM

Hello and welcome to LQ.

You'd have to have some basis. The original battery in that system with some set of tests running. Two tests for battery tend to be useful. One is full power load times and the other is set of common desktop programs running. Sometimes it is a video running test.

I've found that almost all replacement batteries are worse than the original. Some are complete junk, others are close to original.

The side panel will have some rating but no where can you find out how they got that number so it is useless.