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  • Synthetic
  • 2 pack of spare batteries
  • includes charger
  • last 5 hours per charge

Extra batter packs for ThermaCELL's ProFLEX heated insoles can be interchanged with drained batteries for all-day warmth. Rechargeable, removable, lithium-ion polymer batteries easily fit into the insoles. Batteries last up to 5 hours of constant use on medium heat setting. Batteries recharge in 4 hours or less using the included wall charger or USB cable. Batter cover is comfortable, resilient Poron, an antimicrobial, shock-absorbing cushion. Charger cable is removable to use the charger as a batter caryying case. Includes two rechargeable li-ion polymer batteries that fit into ProFlex heated insoles- smart wall/USB charger, and USB cable. One-year limited manufacturer warranty.

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