Draining a Laptop Battery

  • lucassix
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Post 3+ Months Ago

I have an Alienware Area51M that has developed a kind of backwards memory problem. For some reason, the computer thinks it is 100% charged and turns off the charging circut before it is fully charged. I will unplug the AC and watch the battery level drop to maybe 70% and the machine will die. No low battery alarm, no popup, no blinky lights, just dead. I want to completely drain the battery and let it charge it back up, but I can't do that in the laptop becuase it thinks it is fully charged when it is not. So, how can I drain it? I am thinking just find the common and hook each other pin up to it down the road with a small load, a lightbulb maybe, until it "She's not only really dead, she's really most sincerely dead."
  • Anonymous
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Post 3+ Months Ago

  • MOC
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Post 3+ Months Ago

Given the fact that it's Alienware ! do you have any control in the bios ?
And that idea of hooking it up to a small power source is a ggod idea.
Whats there W/S have on that ,and do they have there own Alien Forum.
  • lucassix
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Post 3+ Months Ago

I will recheck the bios and see what is there for power options. What do you mean by W/S? Alienware has a support area, but their answer is to send it back to them and they might get to it within a few months. Not going to do that.
  • ATNO/TW
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Post 3+ Months Ago

Put the battery in the freezer for an hour or so -- no -- I'm not kidding. "ding dong the witch is dead"

//edit -- those were mostly nicads I used to do them with though.
  • joebert
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Post 3+ Months Ago

Have you seen http://www.ozzu.com/hardware/laptop-won-run-battery-t32011.html ? I'm curious if your charging circuit is another victim of XPsp2.
  • lucassix
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Post 3+ Months Ago

SP2? Not likely. I don't believe in service packs.
  • lucassix
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Post 3+ Months Ago

ATNO/TW - I put my battery in the freezer at %100 percent charge, left it in there for a few hours, and put it back in the laptop. It now says 92% and charging. I will update you and see what happens with it once it is charged back up.
  • MOC
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Post 3+ Months Ago

W/S ,WebSite ,i figured you figured that out anyway .lol
I forgot about the battery in the freezer trick ,use to do that
for all types of battery's (not recommend for car battery's .lol)
  • daniel.g.wood
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Post 3+ Months Ago

Blimey ive neva evan heard of that.... ill hafta try it sometime. Hands up if u hate SP 2 by the way.... :P
  • ATNO/TW
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Post 3+ Months Ago

So far I love SP2

re: the battery trick. I learned it when nicads were popular with camcorders specifically. They have a memory feature and sometimes that memory gets a little funky. As best as I can determine, it doesn't deplete the battery, but fixes the memory glitch. I never tried it with Lithium Ions, so I'm curious to see how this goes.
  • lucassix
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Post 3+ Months Ago

Well, after the freeze, I unplugged the AC and watched the battery charge spiral downward. It took 2 mins and 30 seconds to go from 100% to 4% when the low battery alarm went off and it put itself in hibernation.

I don't have an ammeter handy., but I REALLY don't think that I am pulling that much power.

Any more ideas?

Update - It seems to be recharging the battery now in a possably correct manner. It is at 9% now, and didn't skyrocket back to 100% like I assmumed it would. We'll find out.
  • faith4
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Post 3+ Months Ago

wow man
Quote:
Put the battery in the freezer for an hour or so -- no -- I'm not kidding. "ding dong the witch is dead"
nice trick man
  • lucassix
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Post 3+ Months Ago

More spooky tales about my laptop battery:

I left it charging over night last night, and when I woke up, the battery said 54% and stopped charging. Simply splendid. So I unplugged the AC and let if run off the bettery to see where it was. It lasted all of.....33 seconds before dying. So I plug back in the AC, reboot and lo and behold - 100% and charging.

Any more advice would be greatly appreciated.
  • ATNO/TW
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Post 3+ Months Ago

Buy a new battery
  • lucassix
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Post 3+ Months Ago

Looks that way. I am going to dry to drain it manually first. I might be able to get an UPS for cheaper, as that is the only reason I use the battery.

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