Using a fast charger will make no difference if the device being charged can't use the fast charging... You could put a 3000mA charger on there and it will still only draw what the device is designed to draw. You cannot force it to charge faster...
My Radar is charged in ~2 hours using a regular boring standard 2000mA charger - I've not had the desire to see what current the Radar actually draws on charging though.