Author Topic: Hacking A Laptop Battery  (Read 37437 times)

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Offline Kiriakos-GR

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Re: Hacking A Laptop Battery
« Reply #50 on: February 01, 2011, 02:44:04 pm »
That seems like a much better alternative. How about the cells? What are some good places to go for those? Also I haven't been able to find that connector, can you provide a link?

Do you have any physical store with parts in your area ?
If yes , just the picture it will help.

Its commonly used on CB (vehicles) or VHF ( boats ) radios.

Or alternatively use ebay search.  
« Last Edit: February 01, 2011, 02:46:06 pm by Kiriakos-GR »
 

Offline LanceTopic starter

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Re: Hacking A Laptop Battery
« Reply #51 on: February 01, 2011, 05:00:36 pm »
I'm not a big fan of using standard connectors like XLR for non-standard applications like power. What if someone plugged it into their amplifier/mixer, or plugged their microphone into your power supply? But at least low voltage DC is unlikely to kill/seriously injure people.
I'm going to be the only one using it. If I ever did make one for another person I'd pick a more dummy friendly one.
That seems like a much better alternative. How about the cells? What are some good places to go for those? Also I haven't been able to find that connector, can you provide a link?

Do you have any physical store with parts in your area ?
If yes , just the picture it will help.

Its commonly used on CB (vehicles) or VHF ( boats ) radios.

Or alternatively use ebay search.   
Sounds like a plan. There is a store or two around here, when school's out I'll have more time to look around.

Are there any brands of batteries that are particularly good compared to others?
#include "main.h"
//#include <killallhumans.h>
 

Offline Kiriakos-GR

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Re: Hacking A Laptop Battery
« Reply #52 on: February 02, 2011, 08:53:38 am »
Are there any brands of batteries that are particularly good compared to others?

I have no idea of what batteries you are planing to use.
There is plenty of options , but its one it will drive in to a specific sized battery pack,
plus the weight it will come in the equation too.

Generally I favor Sanyo - Sony - Panasonic .   
 

Offline LanceTopic starter

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Re: Hacking A Laptop Battery
« Reply #53 on: February 02, 2011, 06:51:58 pm »
Well I guess I'd be going for some lithium ion cells. I guess I should be asking what characteristics should I be looking for in a battery.
#include "main.h"
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Offline Kiriakos-GR

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Re: Hacking A Laptop Battery
« Reply #54 on: February 02, 2011, 08:01:55 pm »
I do not suggest any use of lithium ion cells , they need special circuitry about charging that you do not have one.

But hey I got confused again ... are you thinking to rebuild the original pack ? ( My suggestion to it its a big NO )
Or to make an alternative battery pack completely external ?   ( Yes with common batteries like NiMH  AA but you will need many of them,
and the 2700mA version does not come cheap.)

About making the battery pack , you are alone on this , as concept.
Its best before you go for shopping , to make an schematic of what you have in mind and post it here ,
so to get an advice . 
« Last Edit: February 02, 2011, 08:16:38 pm by Kiriakos-GR »
 

Offline Hypernova

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Re: Hacking A Laptop Battery
« Reply #55 on: February 03, 2011, 12:18:40 am »
My classmate for his final years proj was making a 3ch Li-Ion power supply and charging system for a robot (which I was building) using some TI management chip.

v1: didn't do anything
v2: blew the chip which takes a week to source from farnell
v3: changed mosfet which blew
v4: Works when he enabled each channel by themselves.  :D

And then when he tried to use all 3 at once they all blew up and he's out of spare chips at this point.  >:(

Oh and this was before the day of the exhibition. :-X
 

Offline LanceTopic starter

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Re: Hacking A Laptop Battery
« Reply #56 on: February 03, 2011, 02:25:38 am »
I do not suggest any use of lithium ion cells , they need special circuitry about charging that you do not have one.

But hey I got confused again ... are you thinking to rebuild the original pack ? ( My suggestion to it its a big NO )
Or to make an alternative battery pack completely external ?   ( Yes with common batteries like NiMH  AA but you will need many of them,
and the 2700mA version does not come cheap.)

About making the battery pack , you are alone on this , as concept.
Its best before you go for shopping , to make an schematic of what you have in mind and post it here ,
so to get an advice . 
I was looking at both actually. I know I need special control circuitry for lithium cells, but I'm sure I can come up with that.
#include "main.h"
//#include <killallhumans.h>
 

Offline Hypernova

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Re: Hacking A Laptop Battery
« Reply #57 on: February 03, 2011, 03:52:47 am »
I do not suggest any use of lithium ion cells , they need special circuitry about charging that you do not have one.

But hey I got confused again ... are you thinking to rebuild the original pack ? ( My suggestion to it its a big NO )
Or to make an alternative battery pack completely external ?   ( Yes with common batteries like NiMH  AA but you will need many of them,
and the 2700mA version does not come cheap.)

About making the battery pack , you are alone on this , as concept.
Its best before you go for shopping , to make an schematic of what you have in mind and post it here ,
so to get an advice . 
I was looking at both actually. I know I need special control circuitry for lithium cells, but I'm sure I can come up with that.
Any half decent battery charger chip will have example circuits spelled out for you.
 

Offline LanceTopic starter

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Re: Hacking A Laptop Battery
« Reply #58 on: February 03, 2011, 10:22:07 pm »
Sounds good. I'll shop around when I have some more time.
#include "main.h"
//#include <killallhumans.h>
 

Offline LanceTopic starter

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Re: Hacking A Laptop Battery
« Reply #59 on: February 07, 2011, 07:54:57 pm »
For charger chips, are there any brands that are generally considered better?
#include "main.h"
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Offline Sionyn

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eecs guy
 

Offline LanceTopic starter

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Re: Hacking A Laptop Battery
« Reply #61 on: February 20, 2011, 07:04:28 am »
Yeah, I'll need to wait till the summer before messing around with this. School is keeping me quite occupied at the moment.
#include "main.h"
//#include <killallhumans.h>
 

Offline Kiriakos-GR

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Re: Hacking A Laptop Battery
« Reply #62 on: February 20, 2011, 08:27:28 am »
interesting read

http://www.laptops-battery.co.uk/blog/how-to-replace-battery-cells-inside-laptop-battery/


 ;D

This is why .... I was suggesting to avoid rebuilding such packs.... there is no simplicity about doing it . 
 

Offline LanceTopic starter

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Re: Hacking A Laptop Battery
« Reply #63 on: February 20, 2011, 06:14:40 pm »
interesting read

http://www.laptops-battery.co.uk/blog/how-to-replace-battery-cells-inside-laptop-battery/


 ;D

This is why .... I was suggesting to avoid rebuilding such packs.... there is no simplicity about doing it . 
Isn't the challenge the whole point? Or part of it at least?
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Offline Kiriakos-GR

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Re: Hacking A Laptop Battery
« Reply #64 on: February 20, 2011, 10:37:01 pm »
Isn't the challenge the whole point? Or part of it at least?

Nop , there is no challenge if you try to do something like that,
with out having knowledge - special parts - and tools.

This thread had come to 5 pages , its not wise to speak over and over about already known things.
« Last Edit: February 20, 2011, 10:40:51 pm by Kiriakos-GR »
 


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