*Fieldsheer garments have an athletic fit. If you are in between sizes or unsure on how to measure, we recommend you order a size up.
The 3.7-volt Premium Bluetooth® heated sock Battery is part of our new 2020 line of Micro USB charging Mobile Warming® batteries. Mobile Warming® uses only the highest quality Lithium-ion batteries to ensure long-lasting power and battery life. Our batteries are designed to power your Mobile Warming product for hours, ensuring you stay warm and comfortable.


The 3.7-volt Premium Bluetooth® battery is exclusive to our Premium BT heated sock and can be controlled with the MW Connect® App.   To learn more about which garments are compatible with what batteries, check out our Mobile Warming® Technology Battery Compatibility Chart.


  • Rating: 3.7volts, 2200mAh
  • Input: DC Jack 4.7volt@1A / Micro USB 5V@0.8A
  • Charge Time: 5-6 hours
  • Size Inches: 2.8in x 1.8in x .5in
  • Size Metric: 73mm x 47mm x 13.5mm

Garments Compatible: