We only use the highest quality Lithium-Ion batteries to ensure long lasting power and battery life. Our batteries are designed to power your Fieldsheer product for hours ensuring you stay warm and comfortable. These 7.4volt batteries are compatible with only Fieldsheer 7.4volt Heated Gloves. **Extra battery is sold as an individual unit. Add a quantity of '2' to the cart for a complete set of replacement batteries for your gloves.