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99711
February 20th, 2012 09:00
latitude e6400 battery life
I have a dell latitude e6400 (purchased new in 2009) and the battery barely lasts over an hour anymore when it is not connected to the charger. I heard that there is a way to do an internal refresh or update for laptop batteries that can extend the battery life. Is this true? If so, how would I go about doing that?
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kirkd
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5.2K Posts
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February 20th, 2012 10:00
Three years on a battery is good. What you are talking about is discharging the battery till the laptop shuts down; the charge level that this happens can be adjusted in the power settings. I wouldn't go below 5%. This will supposedly recalibrate the battery to give a more accurate capacity reading. I have found this to do not much except REDUCE the actual capacity. Others also get this result. Each time you have a total discharge, the battery dies a little more.
Best life is obtained by not going below 25-35% capacity. The lithium batteries used in electric cars are set to not go below 35-59% charge to allow for a 100,000 warranty.
To monitor battery condition, download BattStat. This free utility shows mucho batter usage info.
If you want to get a new battery, try eBay. Prices are low, and some give a three year warranty.
Bay Wolf
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February 20th, 2012 18:00
This doesn't answer your question but it is some good information.
Dell's Battery FAQ
Click HERE to review frequently asked questions about batteries
Extend laptop battery life
Click HERE to read Dell's advice on extending battery life.
kirkd
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February 21st, 2012 07:00
Bay Wolf:
Seems that I did answer the question. I stated that "recalibration" of the battery doesn't work in most cases.
Bay Wolf
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February 21st, 2012 18:00
And your point is? Did you not read my post?
I never said that you didn't answer the question. I said that my post didn't answer the question but it was some good information.