This double pack of rechargeable Li-ion batteries, Powersheer® Micro, is compatible with standard Fieldsheer heated socks, thermal heated socks, and merino heated socks. Control your sock heat levels by pressing the battery or using the wireless remote button to choose between high, medium, and low heat settings. Recharge using the included Micro USB to USB cable for hours of warmth.

• Two batteries, micro USB charging cable included
• Powersheer® Micro-battery
  • Rated Output Power (DC Jack): 3.7 volts, 2,200 mAh
  • Charging Input (Micro USB): DC 5 volts, 1000 mA
  • Charging Time: 4 to 5 hours*
  • Size in inches: 2.8 inches x 1.2 inches x 0.83 inches
  • Size in metric: 71 mm x 31 mm x 21 mm
• Micro-USB charging cable: 1 m
  • Split-Y USB cable with two Micro USB connectors