A quick look at the charger for my MacBook Pro 13 shows an output voltage of 16.5V@3.65A. I electrically challenged and don't know how that will work with 12V. Having said that, Blue Seas makes a 12V receptacle that sports two USB plugs. If it will work, that would be an elegant way to keep things tidy. Regards, Randy Pickelmann Morning Star lying Sunset Bay Marina-Stuart, Fl www.CruisingMorningStar.com Sent from my iPad

Randy, you need to look at the output voltage for the 2 USB plugs on the receptacle at which you are looking. USB chargers typically output only 5 volts at 1 or 2 amps. On the other end of the line, you need to determine how little/much current your laptop needs. Just because the output of the "brick" is 16.5V doesn't necessarily mean that your laptop requires that much to operate. A few years back I bought a power supply with a 12 volt plug on one end (for those "cigarette lighter" receptacles), a very small "brick," and interchangeable tips for the laptop end. Think it might be a Targus but it's on the boat in Carrabelle. I used it on two different laptops over the years by changing the tips. Newer laptops take even less voltage/amperage but I'm still using it with my 8 year old Toshiba that is our "navigation" laptop. My new HP ultrabook (everything but navigation) would easily work with the 12 volt supply if I could find a tip that would fit. <><><><><><><><><><><><>Mozilla Thunderbird<><><><><><><><><><> Bob McLeran and Judy Young Manatee Cove Marina MV Sanderling Patrick Air Force Base DeFever 41 Trawler Melbourne, Florida Blog: http://mvsanderling.net/Blog Web: http://cruising.mvsanderling.net/ On 12/28/2013 8:05 AM, Randy Pickelmann wrote: > A quick look at the charger for my MacBook Pro 13 shows an output > voltage of 16.5V@3.65A. I electrically challenged and don't know how > that will work with 12V. Having said that, Blue Seas makes a 12V > receptacle that sports two USB plugs. If it will work, that would be > an elegant way to keep things tidy.

Hi Randy, For my 15" MacBook Pro w/ Retina display, I use the following: http://store.marinebeam.com/macbook-magsafe-12vdc-charger.html With: http://store.apple.com/us/product/MD504ZM/A/magsafe-to-magsafe-2-converter?fnode=5a Connected to a 12v cig lighter outlet in the pilot house. Used this combo all last year without issues. Randy Soul Tender KK39007 Sent from my iPhone > On Dec 28, 2013, at 8:05 AM, Randy Pickelmann <rwp_48@yahoo.com> wrote: > > A quick look at the charger for my MacBook Pro 13 shows an output voltage of 16.5V@3.65A. I electrically challenged and don't know how that will work with 12V. > Having said that, Blue Seas makes a 12V receptacle that sports two USB plugs. If it will work, that would be an elegant way to keep things tidy. > > Regards, > Randy Pickelmann > Morning Star > lying Sunset Bay Marina-Stuart, Fl > www.CruisingMorningStar.com > Sent from my iPad > _______________________________________________ > http://lists.trawlering.com/mailman/listinfo/trawlers_lists.trawlering.com > > To unsubscribe or modify your subscription options (get password, change email address, etc) go to: http://lists.trawlering.com/mailman/listinfo/trawlers_lists.trawlering.com > Trawlers & Trawlering and T&T are trademarks of Water World > Productions. Unauthorized use is prohibited. >