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bravo88
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Join Date: Dec 2010
Location: 1° North Singapore
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Good Answers: 17

Can Laptop Battery Be Revived?

07/24/2011 11:09 AM

I have changed twice my laptop batteries. Can these Lithium batteries be revived in any way ? I remember reading somewhere that lead acid battery can be revived by a process call desulphacation ? Is there a similar process for Lithium battery?

Also , can normal alkaline AA battery be revived?

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lyn
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Join Date: Oct 2008
Posts: 42355
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#1

Re: Can Laptop battery be revived?

07/24/2011 11:12 AM

Google is your friend. Use it.
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jlstitt
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Join Date: Apr 2011
Location: pittsburgh
Posts: 180
#2
In reply to #1

Re: Can Laptop battery be revived?

07/24/2011 11:29 AM

thanks lyn, i've been having the same problems with the lithium batteries for my porwer tools.
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lyn
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#3
In reply to #2

Re: Can Laptop battery be revived?

07/24/2011 11:36 AM

There are many urban myths about battery care. I don't claim to know ANYTHING about it except what I've read.

Good luck!
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bravo88
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Join Date: Dec 2010
Location: 1° North Singapore
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#4
In reply to #1

Re: Can Laptop battery be revived?

07/24/2011 11:47 AM

Thanks for the tips, I will give it a shot.

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Garthh
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Safety - Hazmat - New Member Safety - ESD - New Member Engineering Fields - Transportation Engineering - New Member Popular Science - Evolution - New Member Technical Fields - Procurement - New Member Hobbies - Target Shooting - New Member Popular Science - Cosmology - New Member Engineering Fields - Architectural Engineering - New Member Technical Fields - Marketing/Advertising - New Member Engineering Fields - Food Process Engineering - New Member

Join Date: Dec 2005
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#5
In reply to #1

Re: Can Laptop battery be revived?

07/24/2011 10:51 PM

I wonder how the newspaper applies

I've had success with NiCad, say a rechargable drill

tape the trigger on

put it in the freezer overnight

recharge

use
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Andy Germany
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Popular Science - Weaponology - New Member Safety - ESD - New Member Hobbies - Fishing - New Member

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#6

Re: Can Laptop Battery Be Revived?

07/25/2011 3:42 AM

Modern Laptop batteries have only a finite number of charges available. Usually about 2000. Can be more.

Plugging the laptop into the mains (laptop switched on of off does not affect the problems) is considered a charge, no matter how short.

The best method is to only plug the battery in when needed, the bummer is storing the battery is done best at the point at which the battery is considered by the Laptop as being empty, usually about 1 volt per cell, where generally 1.2 - 1.3 volts per cell is a full charge.

Which means the battery is discharged just when you need it......

If you are a totally "mobile" person, you have to just buy the batteries.....

If you use it often where there is power, simply remove the battery first and use the laptop on the mains only, they work fine.

In my family we have about 5 Laptops, one is 10 years old, the battery is still fine.....none of the others have needed a replacement ever, the rest except for one are about 5 years old, that one is new....

The last time I needed a replacement was when I was working and I was leaving the battery in all the time, they barely lasted more than a year. Toshiba....

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ehidek
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Join Date: Jun 2008
Posts: 7
#8
In reply to #6

Re: Can Laptop Battery Be Revived?

07/25/2011 7:03 AM

This is a contribution towards making your laptop batteries last longer.

Most Laptop users always leave the ac cord on it even when the battery is 100% full.Leaving it connected reduces the lifespan of the battery.The battery functions well when you made it go through discharging and charging process properly.Immediately the battery is full, disconnect, use it up to the point of charging again and so on....
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Yusef1
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Join Date: Jun 2006
Location: Ottawa Canada
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#9
In reply to #8

Re: Can Laptop Battery Be Revived?

07/25/2011 8:23 AM

citation requested

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JIMRAT
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Join Date: Sep 2008
Location: Where the sun sets on OZ
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#7

Re: Can Laptop Battery Be Revived?

07/25/2011 6:16 AM

The best way to do this is to remove the label very carefully and replace everything underneath.

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jlstitt
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Join Date: Apr 2011
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#10

Re: Can Laptop Battery Be Revived?

07/25/2011 11:05 PM

the only times that i have'nt been able to recharge a lithium-ion or ni-cad battery pact is when i drain the batteries until they're close to being completely dead. i have portable power tools that never kill a battery due to the fact that the tools won't operate after the voltage drops below a certain point. if i use the same batteries, in flurencent camping lights, they can't be recharged. the lights are capable of draining a battery to the point to where the charger considers the battery to be defective.
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JIMRAT
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Location: Where the sun sets on OZ
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#11
In reply to #10

Re: Can Laptop Battery Be Revived?

07/26/2011 7:26 AM

Use your power supply to charge them. Set it at a higher voltage but limit the current to an appropriate level, you will get them back.

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Haajee
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Join Date: Feb 2006
Posts: 1758
Good Answers: 6
#15
In reply to #11

Re: Can Laptop Battery Be Revived?

07/26/2011 7:07 PM

Regards.

Almost all adapters or [chargers] are of 19+~VDC output irrespective of battery voltage which vary from 10~V to more than 15V.

It is the battery software built-in which controls the charge rate.

See my other post for links to see SW built-in

http://www.engadget.com/2011/07/22/charlie-miller-finds-macbook-battery-security-hole-plans-to-fil/

Charlie Miller finds MacBook battery security hole, plans to fill with Caulkgun

and

http://www.electronista.com/articles/11/07/22/white.hat.hacker.to.show.macbook.battery.risk/

Security hack can 'kill' MacBook battery firmware
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Lehman57
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Engineering Fields - Nuclear Engineering - New Member

Join Date: Sep 2009
Location: Louisville, OH
Posts: 1925
Good Answers: 36
#13
In reply to #10

Re: Can Laptop Battery Be Revived?

07/26/2011 6:51 PM

My only experience has been with automotive lead-acid batteries; I have no idea if this will work with lithium or ni-cad. I've had batteries so dead they wouldn't start the charger. Using jumper wires, I put a decent battery in parallel with the dead one, then the charger would go. Eventually I could remove the jumper wires and the charger would continue to charge the formerly dead lead-acid battery. Will this work with your batteries???

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Anonymous Poster #1
#12

Re: Can Laptop Battery Be Revived?

07/26/2011 10:50 AM

Some of the advice given here could result in serious injuries, damage to property etc.....and damaged batteries.

The sad part is that the information was probably given in good faith - but its just old Wive's tales is putting it mildly....

Sorting the "Wheat from the Chaff" is almost impossible....

It seems to have attracted the non Engineers....

Byee.
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Haajee
Guru

Join Date: Feb 2006
Posts: 1758
Good Answers: 6
#14

Re: Can Laptop Battery Be Revived?

07/26/2011 6:54 PM

Please read an article on Battery Codes & Software:

http://www.engadget.com/2011/07/22/charlie-miller-finds-macbook-battery-security-hole-plans-to-fil/

Charlie Miller finds MacBook battery security hole, plans to fill with Caulkgun

and

http://www.electronista.com/articles/11/07/22/white.hat.hacker.to.show.macbook.battery.risk/

Security hack can 'kill' MacBook battery firmware
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Users who posted comments:

Andy Germany (1); Anonymous Poster (1); bravo88 (1); ehidek (1); Garthh (1); Haajee (2); JIMRAT (2); jlstitt (2); Lehman57 (1); lyn (2); Yusef1 (1)

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