THERM-IC S-PACK SOCK BATTERIES The THERM-IC S-Pack Sock Batteries are an essential accessory for anyone who loves spending time outdoors during winter. These batteries are designed to provide the necessary warmth and comfort during cold weather, allowing you to stay cozy and comfortable even in the harshest of climates. The S-Pack Sock Batteries are compatible with all models of THERM-IC heated socks. They feature an easy-to-use switch that allows you to select from three different heat settings, ensuring that you can customize the level of warmth to suit your needs. They're also easy to install and use, and provide consistent heat throughout the day, ensuring that your feet stay warm and comfortable no matter what you're doing. If you're looking for a reliable and effective way to stay warm during the winter, the THERM-IC S-Pack Sock Batteries are an excellent choice. Give them a try today and experience the difference for yourself! FEATURES: - Keeps your feet warm for up to 8-12 hours (depending on the model); - Includes 3 manually controllable heat settings; - Includes a USB charger; - Wall charger NOT included.