Heated jackets can be worth it depending on your individual needs and lifestyle. They are useful for people who spend extended periods of time outdoors in cold weather, such as outdoor workers or winter sports enthusiasts. They can also provide relief for individuals with certain medical conditions that cause sensitivity to cold temperatures. However, they can be expensive and may not be necessary for everyone.

The lifespan of heated clothing can vary depending on the quality of the product and the frequency of use. In general, high-quality heated clothing can last for several years with proper care and maintenance. The heating elements themselves are usually rated to last for around 5000 hours of use. It's important to follow the manufacturer's instructions for care and usage to ensure that your heated clothing lasts as long as possible..

The battery life of heated socks can vary depending on the brand and model, as well as the heat setting used. Typically, heated socks can last anywhere from 2 to 8 hours on a single charge, with higher heat settings draining the battery more quickly. It is important to follow the manufacturer's instructions for charging and using the batteries to ensure they last as long as possible.

Heated jackets are allowed on airlines, but with some restrictions. The batteries used to power the heating elements in the jacket are considered dangerous goods and must be carried in carry-on baggage only, not checked baggage. The battery must be removed from the jacket and packed separately in a protective case. It's important to check with your airline before traveling to ensure that you comply with their specific regulations.