OCOOPA 10,000mAh Rechargeable Hand Warmer
Feels like that mug of hot cocoa between your hands on lazy winter nights, doubling as a battery bank for your other devices when needed.
EnergyFlux Ellipse 5,200mAh Rechargeable Hand Warmer
Provides hours of warm comfort for your hands, and can supply some juice to your phone when you need it.