Laptop battery life

My one year old laptop's battery has slowly lost its longevity.  At first, with minimal apps running, it could go 4 hours or more.  Even under heavy use it was good for 2 hours.

Now, it can barely last an hour.  I dim the screen, disable network cards, keep the optical drive empty, and run as few programs as possible, but nothing seems to help.

In case it's relevant, it's a Dell Inspirion, and is NOT affected by the battery recall (though I wish it was now, so I could get a free new battery)

Well, the real problem is that laptop batteries generally suck, but you laptop fuckers keep on buying them.  China and Singapore have no motivation to improve them, therefore.

Well, enough on the bitchslapping.  I had read some years ago by some battery engineer that he noticed that crystals (of some substance I've forgotten about) built up in the electrolyte of the battery as it aged, and eventually these crystals would short out the battery.  He built a simple rig that pulsed a rather high amount of DC voltage into the battery at the opposite polarity, and then noted that the crystal growths were largely destroyed from the surge, and the battery itself was given a new life or second chance.  This sort of thing should be fairly easy to replicate at home, at least in the basic elements of the rig.  So, if you have a battery and are willing to take a risk with it, build a rig that puts about 3 to 5 times the normal voltage through the battery pack in the opposite of the normal polarity.  If the battery is near useless anyway, this should be an OK risk.

Naturally, when messing around with any battery in such a fashion, wear safety glasses and light gloves, to avoid injury in case it ruptures.

>>1
That's what happens with laptop batteries. Their charge capacities degrade over time.

>>2
fail... the battery degrades over time, simply from use, putting current in the other way doesnt "un-use" it.

Well you can take measures so that they don't degrade as fast. For example about the last 10-15% of the recharging process tend to put the most strain on the battery. so if you don't need a 100% full one, charge it to 80-90%.

Also if you don't use your battery for an extended period of time (days to weeks), don't leave it at 100%. Discharge it to 50% and store it that way.

Finally, some laptops have the bad habit of running on battery power even when plugged in to AC with the result that the battery continually gets discharged a bit and then recharged to 100%. At least there used to be such laptops, maybe there aren't anymore today. If you want to keep it safe, take the battery out of the laptop when on AC.


Of course these can only extend the life of a new battery, not so much yours. And they still do degrade a lot. About half the capacity in 2 years might be realistic, if not a bit optimistic.

>>2
pathetic.

>>4
FAIL.  The battery degrades.  Yes, any fool can see that, even you.  But what is the nature of that degradation?  Yes, fool, the electrolyte undergoes chemical changes.  Hmm!  Could a formation of crystals out of the electrolyte qualify as a chemical change?  YES, YOU MORON!

There are many different types of batteries and their electrolytes are also probably fairly diverse, chemically.  The investigation I read about probably can't apply to all defunct batteries.  But it's a start.  If hitting the battery with a reverse, x3 or more voltage pulse might get more useful life from it, then it should be tried.  As batteries for older laptops get scarce or expensive, it should be tried.

Note well that >>5 is giving equally good advice, if not better.  Batteries have service profiles that people are almost 100% unaware of.  They use the batteries with expectations of a very simple service profile; namely, that the battery is charged up, used, then is recharged.  Most people don't even check their tires on their cars.  Their world is var too simple to account for the depth of the complexity of the technology that serves them.  They are children, lost in a machine shop ... and somebody's gonna get hurt.

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