... battery 3.Temperature 40-45 4,Input power 3w introductionName,usb warm coffee cupMeterial, SBR CR,carbon fiber,denim,lithium ... battery Input power,4W + 0.5W Input Voltage,PC USB 5V Temperature,40-45 SIZE,30*9cmSpecificationsusb coffee cup set ... ,usb heater,usb coffee cup warmer. In-set Li battery. Use portably. Can recharge repeatly Magnetic waterCompatible with PC ...