We only use the highest quality Lithium-ion batteries to ensure long-lasting power and battry life. Our batteries are designed to power your Mobile Warming product for hours ensuring you stay warm and comfortable. These 3.7volt batteries are compatible with only Mobile Warming Heated Socks.

**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 socks.

Specifications:

• Rating: 3.7volts, 2200mAh
• Input: DC 4.7volt, 1000mA
• Charge Time: 4-5hrs
• Size Inches: 2.8in x 1.1in x 0.8in
• Size Metric: 71mm x 27.9mm x 20.3mm