Additional/Replacement Sock Battery (2-pack) 840127834054 It gets up to 42%

It gets up to 42% more power when paired with FLEXVOLT batteries (FLEXVOLT Batteries sold separately)

with a generous cut at the elbows and knees so sleepers can shift positions comfortably throughout the night

slicing and serving

Splitzip pocket for quick access items

and powerful

Additional/Replacement Sock Battery (2-pack) 840127834054 It gets up to 42%Extend your battery life on your Tread Heated Socks or replace expired batteries. For use exclusively with Tread Heated Socks. Will not work on any other Gobi Heat products. Includes 2 batteries. Remote not included. Works with remote that comes with the Tread heated socks already purchased.