Updated model with improved build quality available from 25th May 2014. Compatible with smartphones and satnavs from Samsung, HTC, Google, Sony, TomTom, etc. Note your device will not charge faster than it was designed for - usually this is the same speed as charging from the original mains charger. New PortaPow adaptor which allows fast charging from any micro usb cable also available, search for B00GC4AJOU. A high quality cable is recommended for the fastest charging speed.