BoxWave Charger Compatible With Lenovo ThinkPad Yoga.Warm your cold fingers and charge your ThinkPad Yoga simultaneously! The Rejuva PocketHeat PowerPack is your brand new OUTDOOR ESSENTIAL during the colder months. With its easy to use controls, keep yourself warm while out and about! When you get home, recharge for continuous use!Warm your hands and fingers with THREE (3) HEAT SETTINGS at 42 degrees C (107 degrees F), 47 degrees (116 degrees F), 52 degrees C (125.6 degrees F).Equipped with SAFETY CIRCUITRY and internal mechanisms in place to avoid overheating so that you can stay warm and comfortable without compromising your safety!Avoid the unnecessary waste caused by one-time-use hand warmers; RECHARGE AND REUSE the Rejuva PocketHeat PowerPack to your heart?s content! Charging Cable included to recharge the Rejuva PocketHeat PowerPack!Not just a hand warmer! It?s also a PORTABLE POWER BANK for your ThinkPad Yoga! Use your usual charging cable to utilize the standard USB-A Output and charge your device! With 5,000mAh Capacity, it?ll replenish your ThinkPad Yoga while you?re out and about!Super EASY TO USE! Just click the button to show remaining battery. Long press the button to turn heat ON/OFF. While on, click button to cycle through the 3 heat settings. Smart LED display shows remaining battery so you know when it?s time to recharge!