[. . . ] the appliance is suitable for mains voltages ranging from 100 to 240V. You can also shave without charging by connecting the shaver to the mains. [. . . ] To extend the lifetime of the battery, remove the powerplug from the wall socket and pull the appliance plug out of the shaver when the battery has been fully charged. When charging for the first time or after a long period of disuse: leave the shaver to charge continuously for 4 hours. 4 Remove the powerplug from the socket and pull the appliance plug out of the shaver when the battery has been fully charged. Move the shaving heads quickly over your skin, making both straight and circular movements. Your skin may need 2 or 3 weeks to get accustomed to the Philishave system. Replace the shaving heads (type HQ4 Micro Action) every 2 years for optimal shaving results. You can also take the battery to a Philips Service Centre, which will dispose of it in an environmentally safe way. 1 Remove the powerplug from the wall socket and pull the appliance plug out of the shaver. Let the shaver run until it stops, undo the screws and open the shaver. Do not connect the shaver to the mains again after the battery has been removed. Problem:The shaver does not work after the on/off button has been slided upwards. If you need information or if you have a problem, please visit the Philips Web site at www. [. . . ] Problem:The shaver does not work after the on/off button has been slided upwards. If you need information or if you have a problem, please visit the Philips Web site at www. [. . . ]