Laptop power from cigar lighter please

tangomoon

New member
Joined
18 Oct 2004
Messages
1,929
Location
SW
Visit site
Does anybody know which (precisely) cigar socket power cable will give it the power it needs to function please TIA
 

Hoolie

Well-known member
Joined
3 Mar 2005
Messages
7,811
Location
Hants/Lozère
Visit site
Unless your laptop will run off 12 volts - look at your mains adaptor to check its output voltage - you will need a 12 to 16v (or whatever) inverter from Maplins, PCworld, eBay etc. You can get them with a settable output voltage so you can still use it when you change your laptop!
 

Talbot

Active member
Joined
23 Aug 2003
Messages
13,610
Location
Brighton, UK
Visit site
strongly recommend the 120w maplin Dc/DC converter, but make sure you get the correct plug for your lappie. They come with a selection of the most popular, but others are available.
 

Walusotu

Member
Joined
1 Jun 2007
Messages
31
Location
Poland/Malaysia/Thailand
Visit site
Most laptops work on 19V input. It is an easy matter to purchase a multi-volt (15 to 24v) - 12v adapter (lighter socket) which works perfectly and is probably more efficient than an invertor.
Have bought such in Middle-East, India and Far-East not to mention Europe!!
 

jeremyshaw

New member
Joined
18 Apr 2005
Messages
885
Location
UK
Visit site
Be aware that you often need a reasonably well charged battery for this to work. I have a Dell branded in-car charger for my Dell laptop. The power draw varies according to use (especially disk) and if the battery is dropping towards 12.2v then the charger will tend to cut in and out, presumably because the voltage is insufficient (car batteries are normally well charged). This may just be a phenomenon with the Dell charger...
 

kingfisher

Well-known member
Joined
7 Nov 2001
Messages
1,953
Location
Belgium, Holland
Visit site
Forget all that transformer stuff. I just cut the cable from my dead transformer, and soldered on a cigarette lighter plug. The laptop is rated at 19V (output from original transformer), but runs easily, albeit a little slowly, on 12V. Which means it steps down the processor etc, so it also uses less power.
Leaving the battery in is a debatable issue: it will obviously constantly use power to charge the batteries, but on the other hand, a charged battery is a good thing to have if the on board power fails and if the laptop is your primary navigation tool.
I haven't tried to see whether it can play DVDs at the lower voltage, though.

Another note: for power maintenance, keep the laptop as simple as possible: turn off all background programs such as firewalls, virus scanners etc.
 

PIGLETSDREAM

New member
Joined
25 May 2004
Messages
681
Location
Ashtead, (Office Heathrow Airport)
Visit site
My Toshiba Sattelite Pro, which is old, running Win 98 with no service packs and some chartplotter software runs directly off 12volts and has done for many years. At £80 for a new battery I don't leave the battery in cos it is dead. Now works fine on board, but then it is not the modern power hungry version. Depends on what you plan to use it for
 
Top