From Ice Age Farmer Wiki
Jotting down these items that might be used to construct a rechargable, battery-powered, heated jacket or blanket:
- 2pcs USB Heating Piece Shoes Clothes Feet Heaters Electric Warming Fever Pads
- DC 5V 2.5W USB Heating Plate Warmer For Gloves Mouse Pad
- DC 5V USB Electric Cloth Heater Pad Heating Element for Pet Warmer 50 Degree
Props to User:ZeroDivide32 for sourcing the above.