19 volt power supply for laptop?

[Viktor]

The only problem I can see is that it may not be enough to charge the laptop battery

From experience if the power supply does not reach the correct voltage, the computer may not boot up,
or if it does the strain on the power supply will destroy it much quicker than normal.

I had an underpowered power supply that did boot the computer burn out after 15 mins, so I imagine
your unit if the max is 14 volts is going to have a problem of one or the other.

These units are available with the slider resister going up to 19 volts and beyond...I have two which
range from 15 - 24 volts bought off eBay which came from Hong Kong, but you can get similar at
Maplins and they all come with interchangable power connectors for your make of laptop.

See link at the beginning of this thread.

 

[robbiec0]

If it is the same as mine, it does not do 19 volts. It steps up 18 - 20 - 22 etc.

I need a 19 volt one as my laptop has died and I have a new netbook which is 19 volt. Every single netbook that I looked at was 19 volts.

No, it had 19v. All laptops appear to be 19v. All those I have had have been.

 

[Bernard Jones]

From experience if the power supply does not reach the correct voltage, the computer may not boot up,
or if it does the strain on the power supply will destroy it much quicker than normal.

I had an underpowered power supply that did boot the computer burn out after 15 mins, so I imagine
your unit if the max is 14 volts is going to have a problem of one or the other.

These units are available with the slider resister going up to 19 volts and beyond...I have two which
range from 15 - 24 volts bought off eBay which came from Hong Kong, but you can get similar at
Maplins and they all come with interchangable power connectors for your make of laptop.

See link at the beginning of this thread.

Best just look at whats written on the laptop battery, mine is 11.5 volts, and thats enough to boot up the computer, just that the screen is not as bright. From what you say your underpowered power supply could not supply enough current (amps), which would then lead to a drop in voltage below the 12 - 15 volts you would have got direct from the battery.

Incidentally there are an enourmous amount of different power sockets fittet to laptops, so you may not get a suitable one with these kits. It seems every laptop manufacturer has their own size of power supply socket, presumably because they want you to use their power supply with it.
Don't be tempted to force the plug in if it doesn't fit in easily, because if it damages the socket in the laptop it could make the laptop useless and beyond economic repair.

 

[Bernard Jones]

If it is the same as mine, it does not do 19 volts. It steps up 18 - 20 - 22 etc.

I need a 19 volt one as my laptop has died and I have a new netbook which is 19 volt. Every single netbook that I looked at was 19 volts.

18 volts would be fine.
Best to play safe as you won't damage it by supplying a slightly lower voltage.

 

[Sparks]

Post deleted

 

[Bernard Jones]

Thanks for the info Sparks. Looks a bargain if it fits your laptop. But with only 8 plugs there will be a lot it does not fit - (doesn't fit my Dell Inspiron) but they have helpfully listed the plugs which are included;
Connector Size:
4.0(E.D) x 1.8(I.D) x 10.8(C.L)mm
4.8(E.D) x 1.9(I.D) x 9.7(C.L)mm
5.0(E.D) x 3.4(I.D) x 11.8(C.L)mm
5.5(E.D) x 1.5(I.D) x 12.8(C.L)mm
5.4(E.D) x 2.1(I.D) x 12.6(C.L)mm
5.5(E.D) x 2.5(I.D) x 12.9(C.L)mm
6.3(E.D) x 2.9(I.D) x 13.3(C.L)mm
5.9(E.D) x 4.3(I.D) x 13.9(C.L)mm
E. D = External Diameter, I. D = Internal Diameter, C. L = Connector Length
Support most Notebook: Sony, Dell, HP, Compaq, Toshiba, Acer and IBM (With circle plug)

Because there are so many types and sizes, some of the power plugs fitted to laptops are so close to others the only way you can see if they will fit is to try them to see if they fit in easily. I know of laptops being made useless by forcing in power plugs which don't fit.

 

[Viktor]

If you nip into your nearest Tesco (Extra) you can pick up an extension 12 volt cigarette lighter style extension lead for
about a £5

 

[Deleted member 11815]

Word of warning - buy a bigger power adapter than you NEED.
e.g. if your laptop is needs 1.5 - get a 2.5A adapter etc. My first adapter was on the limit, got hot, and blew up and *almost* took teh laptop out in the process....

The one I use is the variable voltage/adapter one similar to the big ones in Maplin. I would also suggest you come up with a "lock" to stop the voltage switch moving - as I have accidentally knocked this (fortunately down!).

 

[Bernard Jones]

If you nip into your nearest Tesco (Extra) you can pick up an extension 12 volt cigarette lighter style extension lead for
about a £5

But they don't fit the power socket on a laptop

 

[ourglenard]

Clicked on the ebay link & had to laugh....EXACTLY the same as the one I got from China....except free p&p from China as opposed to £2 from Greenford!!!
:lol-053:

 

[Ian Wood]

Apple Mac 'Magsafe' 12v charging solution

If you have an Apple Mac laptop with the 'Magsafe' charging plug try this link, DC auto/airline MagSafe power supply, can't 100% recommend it yet, I'm just about to try it for myself when the bits arrive.

 

[brummy]

hi i use mine all night long you have to run it thorw a inverter, you our better if you use the same wire as you would find on jump leads heaver the better go rite to thr battrey i hope this helps.
brum