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Dimitryy
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Posted - 2008.11.15 22:52:00 -
[1]
Edited by: Dimitryy on 15/11/2008 22:52:05 My laptop charges with a 12 volt charger, i was wondering what would happen if i tried to charge it with a 9 volt charger. Both have the same plugs, AC/DC converter and all that, the only difference is the voltage.
Let me know what you think, thanks.
-Dimi |
Sazkyen
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Posted - 2008.11.15 23:02:00 -
[2]
My guess is that it simply wouldn't work. You could probably use a 12V charger that can provide higher amperage than your notebook requires.
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Alty MacAlterson
Alt Corporation
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Posted - 2008.11.15 23:04:00 -
[3]
A 9V charger wouldn't charge it and might damage it.
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SpaceSavage
Omega Fleet Enterprises Executive Outcomes
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Posted - 2008.11.15 23:05:00 -
[4]
Its not just voltage, its ampage as well.
It'll need something like 12 Volts at 2.5 amps or something. Putting a lower Voltage charger in, wont do anything, it just wont work. _______________
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Sniper Wolf18
Gallente Apocalypse Ponies H E L I C O N
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Posted - 2008.11.16 00:08:00 -
[5]
If you use a direct mains (240 volt) charger, it will charge super fast! |
Akita T
Caldari Navy Volunteer Task Force
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Posted - 2008.11.16 00:24:00 -
[6]
Edited by: Akita T on 16/11/2008 00:25:48 You need a HIGHER voltage on the charger than the rechargeable battery provides. If you can't provide it, you can't charge it. For instance, all "12V chargers" actually provide closer to 14V (well, over 13V anyway) in order to recharge a 12V battery.
Theoretically, let's say your 9V charger actually provides slightly more than 11V (not really likely, but let's say they would), and the drained cells no longer have 12V but slightly below 11V (again, not really likely, but let's say it is so)... then yes, you could charge them a LITTLE bit... and they would charge slower and slower as they get closer to the actual voltage provided by the charger (very soon) and then stop charging altogether. ___
But anyway, there's an easier way. You can simply use a PC PSU to get the needed 12V. On the power connectors, the YELLOW cables are +12V, the RED ones are +5V and the BLACK ones are the common/ground.
P.S. It's more like +12.x V (usually you can see exactly how much in your BIOS or in a hardware monitoring program) so it should charge your 12V pack easily. Just be careful not to short-circuit anything, you wouldn't want to buy a new PSU (or worse, a new motherboard or entire PC).
P.P.S. Never done it before to charge a battery (only power low-wattage stuff), so I'm not even sure it can provide the necessary current at all (or worse, get damaged by the barely-charged batteries).
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Create a character || Fit a ship || Get some ISK |
IR Scoutar
Caldari State War Academy
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Posted - 2008.11.16 00:31:00 -
[7]
its generaly a very bad idea to jam diffrent volts into anything than what is specified ...
sticking to specified volts matters amps not so much (however a minimum may be required)
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Yorlock
Caldari Farmer Killers United Corporations Against Macros
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Posted - 2008.11.16 11:41:00 -
[8]
Unless your into clouds of blue smoke and smell of ozone, I strongly suggest ONLY using the charger recomended by your batteries manufacturer.. these newer lithium batteries have much more 'energetic' chemicals. |
CandyFalcon
Caldari L337.
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Posted - 2008.11.16 11:46:00 -
[9]
Originally by: Sniper Wolf18 If you use a direct mains (240 volt) charger, it will charge super fast!
Well depending on where you live...if you have a 115v Charger and you plug it up to a 240v plug in it's going to charge the battery faster yes, but the battery is more likely to burn up as well as it will decrease the overall lifetime of the battery.
Do this test...
Plug in a fan or a blender that is supposed to be 115v into a 240v plug in and see what happens, lol. |
HankMurphy
Minmatar Pelennor Enterprises
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Posted - 2008.11.16 12:11:00 -
[10]
if you want to break stuff, sure. plug in anything that you can make fit.
you could even use the plug, then cut the cable and splice on some other adapter and try that out.
god, i have a terrible case of 'harsh cynical sarcasm' going on this morning. |
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Jaine Li
Science and Trade Institute
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Posted - 2008.11.16 12:17:00 -
[11]
simple answer Don't do it.
also if you use a dell(god is the only one who can save you if you do) you can only use thier ricusly expensive adpters. as the had a secret 3rd line who activates the charging of the battery. so a universal adpter will let your laptop run but wont charge the battery. I found this out last year and send dell a smashed latop back with a note that i never would buy from them again. (hell they asked 170 euro for a adaptor that broke after 18 months) Jaine Li just doing want needs to be done. PS: who stole my whiskey? |
Verone
Veto Corp
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Posted - 2008.11.16 12:21:00 -
[12]
Originally by: CandyFalcon Well depending on where you live...if you have a 115v Charger and you plug it up to a 240v plug in it's going to charge the battery faster yes, but the battery is more likely to burn up as well as it will decrease the overall lifetime of the battery.
Do you even know how a transformer works? That's the most stupid thing I've heard in a long time.
Seriously to the OP, take the advice of a qualified electrical engineer and only use the charger that your laptop and battery maufacturer reccomends. Plugging anything that's over-rated into the pack will cause excessive heat and probably cause the cell to rupture and catch fire. Plugging anything underrated in is likely to do the same over a longer period of time because of heat build up and failure to charge.
Trust me, a lithium ion cell catching fire is the last thing you want to happen while you're charging your laptop overnight and are asleep.
If your charger is damaged, buy a replacement with the same Primary (incoming mains) voltage and current, and the same secondary (output) voltage and current. You can but replacement chargers from most decent comuter stores and if you're unsure just take the broken one with you and they'll help you out.
\o/ EON FICTION WRITER OF THE YEAR! \o/
>>> THE LIFE OF AN OUTLAW <<< |
Jaine Li
Science and Trade Institute
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Posted - 2008.11.16 12:37:00 -
[13]
Originally by: Verone
Originally by: CandyFalcon Well depending on where you live...if you have a 115v Charger and you plug it up to a 240v plug in it's going to charge the battery faster yes, but the battery is more likely to burn up as well as it will decrease the overall lifetime of the battery.
Do you even know how a transformer works? That's the most stupid thing I've heard in a long time.
Seriously to the OP, take the advice of a qualified electrical engineer and only use the charger that your laptop and battery maufacturer reccomends. Plugging anything that's over-rated into the pack will cause excessive heat and probably cause the cell to rupture and catch fire. Plugging anything underrated in is likely to do the same over a longer period of time because of heat build up and failure to charge.
Trust me, a lithium ion cell catching fire is the last thing you want to happen while you're charging your laptop overnight and are asleep.
If your charger is damaged, buy a replacement with the same Primary (incoming mains) voltage and current, and the same secondary (output) voltage and current. You can but replacement chargers from most decent comuter stores and if you're unsure just take the broken one with you and they'll help you out.
think that makes it pretty clear. but remember if you have a dell on dell loader will charge your battery. so for those who dont have a dell don't buy a dell they are gready and only let you use thier stuff on thier PCs my dell printer and scanner wont work on my new pc because it aint a dell. Jaine Li just doing want needs to be done. PS: who stole my whiskey? |
Vladimir Ilych
Gradient Electus Matari
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Posted - 2008.11.16 20:11:00 -
[14]
Edited by: Vladimir Ilych on 16/11/2008 20:11:15
At best you will ruin the battery.
At worst you will burn your house down.
I have seen a user where I work set their laptop on fire after using the AC DC converter from their kids casio keyboard after losing the one that came with the laptop. |
Dimitryy
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Posted - 2008.11.16 21:40:00 -
[15]
Thanks everyone for the help, i wont try sticking my 9v cellphone charger in then :) And Akita T, thanks for the info about the PC PSU, that worked great with a little jury rig setup.
Thanks again,
-Dimi |
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