Cruisers Forum

  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
Thread Tools Search this Thread Rate Thread Display Modes
Old 13-03-2012, 11:31   #1
Registered User

Join Date: Mar 2012
Posts: 2
Laptop lead



Can anyone help.

I need a lead for charging my laptop up on the boat from a 12 volt supply.

I bought a lead for a car thinking it would work but it would not and when I contacted the supplier I was told it is not meant for boats so I need to find one that is.

Thank you

Diane Shorrock is offline   Reply With Quote
Old 13-03-2012, 11:33   #2
Registered User
Sailmonkey's Avatar

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 9,614
Re: Laptop lead

Car, boat, what's the difference? both are 12 volt systems. Does the car charger work in the car?
Sailmonkey is offline   Reply With Quote
Old 13-03-2012, 11:44   #3
Registered User
delmarrey's Avatar

Join Date: Mar 2003
Location: Philippines in the winters
Boat: It’s in French Polynesia now
Posts: 11,359
Images: 122
Re: Laptop lead

You can buy SS cigarette lighter outlets for boats to plug in an adaptor.

Deluxe Receptacle
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
The measure of a man is how he navigates to a proper shore in the midst of a storm!
delmarrey is offline   Reply With Quote
Old 13-03-2012, 11:51   #4
Registered User

Join Date: Nov 2010
Location: Heath, TX
Boat: 1978 Pearson 26 One Design
Posts: 316
Re: Laptop lead

I posted about a similar problem. You can read the responses here.
rhr1956 is offline   Reply With Quote
Old 13-03-2012, 11:55   #5
Moderator Emeritus
roverhi's Avatar

Join Date: Aug 2005
Location: Carlsbad, CA
Boat: 1976 Sabre 28-2
Posts: 7,505
Send a message via Yahoo to roverhi
Re: Laptop lead

Believe the lap tops need a higher voltage to charge than supplied by the batteries. You need to run the engine while you are charging. You can buy step up voltage adapter chargers that will work with just battery voltage.

I just bought a cheap small inverter and plug the Computer AC charger into that. It's undoubtedly not super efficient but still has a very low draw and was CHEAP. Did I mention it was CHEAP. I've got more solar charging capacity than I can use so even if it was grossly inefficient, it would work for me.
Peter O.
'Ae'a, Pearson 35
'Ms American Pie', Sabre 28 Mark II
roverhi is offline   Reply With Quote
Old 13-03-2012, 12:12   #6
Moderator Emeritus
hummingway's Avatar

Cruisers Forum Supporter

Join Date: Jan 2010
Location: Gabriola Island & Victoria, British Columbia
Boat: Cooper 416 Honeysuckle
Posts: 6,933
Images: 5
Re: Laptop lead

I use a DC to DC converter. It's far more efficient then an AC inverter and it's designed for my laptop. I think I bought from these guys though I don't remember for sure : High Reliability Auto to Laptop DC/DC Converter for all computer models.
“We are the universe contemplating itself” - Carl Sagan

hummingway is offline   Reply With Quote
Old 13-03-2012, 12:24   #7
CF Adviser
Moderator Emeritus
Hud3's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: Virginia
Boat: Island Packet 380, now sold
Posts: 8,942
Images: 54
Re: Laptop lead


Buying a 12 VDC charger isn't quite as simple as grabbing one off the shelf at Radio Shack. You need to make sure it's input voltage range is adequate to handle the variation it'll see from your boat's batteries--anywhere from 12 VDC or a little less up to 14.8 VDC when the charging system is on.

You also need to match the voltage and amperage requirements of your laptop. If you look at the "fine print" on the bottom of the charger "brick" that came with your laptop, you'll see it's electrical output specs. Mine says 19 VDC and 3.42 Amps. Multiplying the two, that's 65 Watts. So I need an adapter that will put out a steady 19 VDC and 65 Watts of power.

The simplest and safest thing to do is to buy one that's designed to work with your specific laptop.

Targus makes it easy. They have a tool on their website that tells you exactly which of their 12 VDC chargers will work with your particular laptop. Some of the other reputable manufacturers, like Kensington, may have similar help available, also.
Hud3 is offline   Reply With Quote
Old 13-03-2012, 13:06   #8
Registered User

Join Date: Mar 2012
Posts: 2
Re: Laptop lead

Thank you all very much. I have now have a few ideas to try.

Diane Shorrock is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Laptop With Digital Charts Possible? Triton318 Navigation 41 21-02-2013 18:39
1979 Pearson 32 - Lead? outdoorsman37 Monohull Sailboats 1 10-03-2012 10:51
12V Laptop Charger arjand Marine Electronics 12 27-01-2012 09:56
Drilling Lead Keel for Bolts bweger Construction, Maintenance & Refit 26 06-01-2012 11:33

Advertise Here

All times are GMT -7. The time now is 03:55.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.