4V (2200 mAh) rechargeable Lithium-Ion batteries and a AC charger. With a touch of a button, you can select from four different temperatures, ranging from 135°F on high to 90°F on low. On high, expect up to 2.
Includes 2 7.They feature an anti-slip palm, touch screen compatility, a wrist loop, a gauntlet cinch closure and a pull-on glove loops. You can expect up to 8 hours of heat per charge.