Developed for the Therm-ic Ultra Heat Boost Gloves and Ultra Heat Boost Mittens (gloves with a new heating element (+1.5W) to increase the feeling of warmth), these 5200mAh batteries are more powerful, allowing you to get more heat. In addition, these batteries charge faster than the old ones (5h30 instead of 8h).
An all region USB power supply is included along with a adapter to allow battery charging separate to the gloves. Great for travelling.