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Last reply by 06-25-2011 Unsolved
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2 Bronze
2 Bronze

How to Maximize Battery Useful Life - M11x R1

After 15 months of ownership, my M11x battery stopped working and a 'Consider Replacing Battery' message along with a red 'X' over the battery icon appeared.  This happened suddenly over the course of just a day.  My system spends most of its time plugged in on my desk and has been used on battery only occasionally, so it puzzled and frustrated me when I saw that the battery was already shot.  I now have a new $160 battery installed and am wondering if there is something I can do differently to make it last longer.  Previously, I have kept the laptop plugged in and I just close the lid (sleep mode) when I am done using it.  I don't know if this continually cycles the battery or has some other causative effect that killed the battery. 

Is it better to hibernate the system than to have it sleep?  Sleep is nice because it comes up right away when opened, but if it is going to kill the battery again from using sleep, I would gladly use hibernate instead.

Are there any other actions that can be taken to prolong the life of the battery?

I have heard that these Li batteries have a maximum number of cycles and after that, they stop working.  I think the number the tech (not the brightest bulb on the tree) told me was about 1,500.  There is NO WAY I ran down the battery on that laptop 1,500 times!  I had only owned the system for less than 500 days when the battery died, and probably used it on battery without being plugged-in less than 50 times, so there is something else I was doing that caused the battery to 'think' it was cycled so many times.  Either that or the batteries are defective or the number of cycles is far less than 1,500.

I know others have also complained of short usable life from their M11x batteries, so this is not an isolated situation.

I would appreciate any information on how to prolong the time period before I have to buy another battery.  This could get expensive!



Replies (5)
2 Bronze
2 Bronze

I might add that the Dell Battery Meter app is invoked when you press <Fn>+<F2>.  After the install and a reboot, both the Alienware OSD 'Battery Enabled' indication and the Battery Meter app will pop up.  The Battery Meter has a checkbox you can use to select whether the battery charges or not.  If you check the box (on the 'Battery Life' tab), you can disable charging.  You can uncheck the box and the battery will charge again.  Without this app, you have to reboot the machine and go into BIOS to do this, which is, um, not exactly convenient.  

I wish this system did a better job of preserving the battery by minimizing the number of charge cycles, but given that it doesn't, this could be a big help.  



2 Bronze
2 Bronze

OK, thanks for that info.  Like I said, I was not real impressed with the Dell support rep who told me the 1,500 cycle number.  I have learned a few things since I added this post...

My laptop was at 100% charge virtually all the time. I kept it plugged in almost always and just closed the lid (sleep mode) when I wasn't using it. I like sleep mode because the machine comes up immediately when you open the lid. I now think that the M11x battery charging system will smoke your battery if you operate this way. I have downloaded the 64-bit Win7 Dell (not Alienware) Battery Meter application (not listed as a download for my system, but I just found a version for an Inspiron and downloaded and installed it) and will be using it to disable charging when the unit is plugged in. I can use my M11x the same way I did previously without continually having the unit cycle the charging. I think what was happening before was the sleep mode slowly drained the battery and then it 'topped up' after each slight discharge. By disabling charging and keeping the battery at 40-50% (recommended on several battery-oriented web sites), I hope to have the $160 battery last at least 2-3 years.

10 Diamond

There isn't much you can do about heat then.  The normal life of a lithium ion battery is about 300-500 charge cycles - it's nowhere near 1,500.

2 Bronze
2 Bronze

The m11x does not have a removable battery, so this is not a practical solution.  One must remove 12 screws and one ribbon connector to remove the battery.

10 Diamond

Remove the battery when you're using the system on AC power.  Doing so reduces exposure to heat, which, other than deep discharging, is the number one cause of premature battery aging.

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