Lenz Heat Pack 2.0 Accupack

"The Heat Pack 2.0 Accupack from Lenz is the ideal solution for anyone who doesn't want to do without warm heat even in cold temperatures. Designed as a spare part, this battery pack provides a reliable heat source and is specially developed for use with compatible Lenz products. The integrated contact protection ensures safe use by preventing unwanted contact points and thus extending the service life of the product."
"Please note that a charger is not included, so you may need to purchase a separate charger to utilize the full potential of this battery pack. The unisex design makes it suitable for all genders and therefore offers flexible application options for everyone. With the Heat Pack 2.0 Accupack, your feet will stay nice and warm even in the coldest of environments."