Never be left out in the cold again! The ThermaCELL Heated Insoles ProFLEX Heavy Duty Extended Life Battery Pack allows you to prolong the warmth on your ThermaCELL Heated Insoles ProFLEX Heavy Duty. Always have a spare set available to accompany your insoles. These Extended Life Batteries will also fit into the standard ProFLEX version of ThermaCELL Heated Insoles.
• Includes Two Rechargeable Lithium-Ion Polymer Batteries, Wall Charger, Smart Charging Case and USB Cable
• Prolong warmth without removing insoles from shoes
• Provides up to 8.5 hours of warmth per charge (on low)
• Rapid charge through USB or wall outlet in 2 hours or less
• Antimicrobial, shock-absorbing Poron cushion battery cover
• Batteries easy to change without removing insole from shoe.
• Wall charger wires disconnect, become carrying case for batteries