The 3.7v Powersheer Wireless Heated Sock Batteries are premium power banks for your Mobile Warming Wireless Heated Socks. These batteries are equipped with a convenient USB C quick charge port and a boosted 4000mAh capacity. This means longer heat times, ensuring you’re your feet stay warm throughout your outdoor activities. Engineered with comfort in mind, these batteries feature a calf-contoured design that seamlessly integrates with the Mobile Warming Wireless Socks, providing optimal fit and flexibility, allowing you to move freely while enjoying the soothing warmth. Whether you’re hitting the slopes, trekking through the snow-covered landscapes, or simply bracing the winter chill, stay in control with the included wireless remote. Connect your heated socks with the included wireless remote control for seamless function and control of your heated socks. Adjust heat settings to customize your warmth levels directly from the remote. Embrace the winter season with the assurance that your feet will stay comfortable warm, thanks to the advanced features of these exceptional batteries.