Taking care of a heated jacket is simple, but it is important to follow certain steps to keep it working well for a long time. The first rule is to always remove the battery before washing the jacket. Washing it with the battery attached can damage the electrical system. Most heated jackets can be machine washed, but it’s best to use a gentle cycle with cold water. Use mild detergent and avoid bleach or strong chemicals, as they can damage the fabric and heating elements.