Posted: Fri Sep 17, 2004 10:39 pm Post subject: ICN639 battery power
Had similar thoughts myself. There is some sort of voltage regulator inside the cigar adapter which reduces the voltage to 5.3 volts. Initially I thought of hardwiring my Navman directly to the battery because I don't like to see the curly wire draped over the dash - which incidentally sometimes causes the Navman to switch off as there is quite a ''pull'' from the wire, breaking the contact in the small plug to the Navman. I don't know how to reduce the voltage to a level that won't fry the Navman innards. I bought a dc battery adaptor, with a normal, non-coiled wire which I could gently and discreetly drape across the bottom of the windscreen from Maplin (£4.99) that holds 3x 1.5 v AA batteries, the 4.5 volts generated allows the Navmam to work OK (so it is now portable) but the screen illumination is very poor and not satisfactory for in-car use. I did contact Navman and they said they would not support any power lead except their own - understandable I suppose. So how do you reliably produce 5.3 volts from a 12v supply that will avoid using Navmans super-curley, cigar adaptor?? Anyone out there know how it can be achieved for the non-technically minded???
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