More power. Longer heat. Smarter performance. The Powersheer(TM) Plus v2 7.4V Battery is the ultimate upgrade for anyone looking to extend the runtime of their Fieldsheer heated gear. With a 4000mAh capacity, this high-output Li-Ion battery delivers extended heat compared to standard batteries-perfect for long workdays, multi-day adventures, or frigid environments where lasting warmth matters. Compatible with all Fieldsheer 7.4V Heated Jackets, Vests, and Baselayers, this battery also comes standard with select Fieldsheer heated products. The upgraded USB-C port supports both fast charging input and power output, allowing you to recharge the battery more quickly or use it to charge compatible phones, accessories, and other USB-powered devices while you&';re on the move. An integrated LED flashlight provides added convenience when the lights go out or the job isn&';t finished.