Use this compatible in car charger to charge your device whilst on the move in your car. This in car charger has a coiled lead which stretches to 1.5 metres, a power status LED and changeable fuse for protection. The charger is 12 volt and 24 volt compatible and is fully CE and Rohs approved.
The only issue, is that the cable is a sprung cable and is so shorter than a straight cable and you need to stretch it to make it reach the windscreen.
The sat nav in-car power supply could have had the voltage and current output rating stated as the Sony sat nav required 5.2 volts and 2 amps at least to charge an use. I wonder if the supply was up to it as the original Sony product was far more substantial. The product was well made though and my comments above don't detract from the supplies userbility. Can't beat the price. When in use it does not get too hot either.