A compact battery with high powered performance the Hotronic Battery Pack XLP 2P BT uses Lithium-Ion battery cells to deliver warmth when it is needed most, and for a full 18 hours of run time. These batteries are controlled through a Bluetooth ap that runs on iOS or Android smartphones, giving you the ability to conveniently control the 6 heat settings plus push the power with the additional Power Boost level. Control stand-by mode (for when you’re taking a well-earned break with coffee) and a summer sleep setting as well. Recharging is a snap, these are sharged through the intelligent, Global Recharger, making traveling with toasty toes easy. You’ve got that all-inclusive ski pass0 maybe you should check out that resort in Japan0 Increased capacity in a compact battery, now with Bluetooth compatibility so you can dial in your heat settings for precise control of the environment in your boot, whether you’re replacing, upgrading, or building your own system to meet your needs, this battery is going to give you a longer use range. For those who need to run their heaters hotter, or those looking at being unable to recharge their batteries overnight so need extra capacity, the XLP 2P BT is going to provide greater range in a battery.