Heated gloves come in two main styles: Those that are heated via chemical warming packs, and those heated by electricity from batteries. The former use disposable warming packets that fit in pockets within the gloves. Electric-powered gloves are more common, more efficient, and more expensive. They have heat elements built in, and are generally turned on by a mechanism on each glove. Some models utilize one-time-use batteries, while others have batteries that can be recharged over and over. In general, gloves with rechargeable batteries are more expensive than those with replaceable batteries, but they also are more cost-efficient in the long run since you don’t have to purchase batteries repeatedly.