Gerbing's Hybrid Heated Gloves The new line of 12V Hybrid Products utilize Gerbing's Hybrid Heating System. This system allows you the option of powering from your vehicle's 12V electrical system, or from Gerbing's 12 volt lithium-ion battery pack with its built-in microprocessor temp controller. FEATURES Made with premium, supple, drum-dyed leather Soft tricot fleece lining with 100g of Thinsulate lining Incorporates Gerbing's Microwire heating technology that uses micro-sized heating fibers to surround the hand with warmth Internal Aquatex waterproof/breathable membrane (though the leather exterior is not waterproof and should be treated with Nikwax Glove Proof ) Includes vehicle battery harness and Y-harness Two 12 V batteries and a charger are optional (sold separately) SPECIFICATIONS Approximate battery capacity per charge for 12 V hybrid glove batteries Power Level Run Time High 1 hour Medium 2.5 hours Low 4 hours Vehicle Battery unlimited ACTUAL RUN TIME FOR THE GERBING's HYBRID HEATED GLOVES MAY VARY DEPENDING ON AMBIENT TEMPERATURE. BATTERY CAPACITY DECREASES IN VERY COLD WEATHER, ESPECIALLY IF THE BATTERY IS NOT INSULATED, AND IS LEFT EXPOSED TO THE ELEMENTS. AT LESS THAN 32 DEGREES FAHRENHEIT A BATTERY MAY ONLY PRODUCE 80 OF ITS CAPACITY.