Built for maximum heat output and long-lasting performance, the Powersheer™ XXL 12V Battery is our most powerful Li-Ion battery—designed exclusively for Fieldsheer's Dual Power and 12-volt heated gear. With a rugged construction and a massive 5200mAh capacity, this battery keeps your gear running longer, even in the most brutal cold.

Whether you're on the job site, in the backcountry, or powering through the coldest days, the XXL battery delivers serious runtime to keep your core and extremities warm. A built-in flashlight offers utility in low-light conditions, and the USB port allows you to charge smartphones and other devices on the go—turning your battery into a portable power hub. UL/CE certified for safety and reliability.