FAQ-General Question　Q: Can it also heats cold water Before it goes through the coffee capsule? A:yes, It can heat up cold water with the cigarette plug for car as well as AC adapter at home or office, for USB cable, however, you should pour into hot water. Q: Which set to buy if to make hot coffee at home or office? Can I use my mobile phone adapter for heating cold water A: Please choose the one with AC adapter which is designed for this appliance, your mobile phone adapter is not powerful enough for this appliance. Q: Is the car coffee maker rechargeable? A: No ,there is no battery inside, so , you can carry on airplane without problem. Q: How long should I wait to get hot coffee done? A: It takes about 5~6 minute to make hot coffee.