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Old 03-05-2012, 11:53 AM   #24
jwright5
Junior Member
 
Join Date: Feb 2012
Location: Maryland, USA
Posts: 1
Re: Any ideas of a good 12V Power Outlet to connect my GPS?

Hey guys, a good general rule of thumb for anything that charges via a USB standard (so pretty much every phone and GPS unit) is to assume a maximum draw of 11 Watts from the unit, plus whatever inefficiencies are inherent to your charging adapter. So maybe 15 Watts with a safety margin or around 1.25 amps on the 12V leg per device.
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