A battery pack dehumidifier system, comprising: a battery pack, comprising a battery pack enclosure configured to hold a plurality of batteries; and a dehumidifier assembly, comprising: a desiccant enclosure; a desiccant contained within said desiccant enclosure; a first air passageway coupling said desiccant enclosure to said battery pack enclosure, wherein said first air passageway allows water vapor to pass from said battery pack enclosure and into said desiccant enclosure where said water vapor is absorbed and adsorbed by said desiccant; a controller configured to estimate when said desiccant loses absorption/adsorption efficacy, wherein said controller is further configured to output a first control signal when said desiccant loses absorption/adsorption efficacy; a heater assembly, wherein said heater assembly is configured to heat and reactivate said desiccant within said desiccant enclosure upon receipt of said first control signal, wherein during heating and reactivation of said desiccant moisture is released from said desiccant; and a second air passageway coupling said desiccant enclosure to a volume of air outside of said battery pack enclosure, wherein said moisture released during desiccant heating and reactivation passes through said second air passageway; characterized in that said heater assembly further comprises a heating element held apart from the desiccant by a first thermally conductive structure, and a plurality of second thermally conductive structures that are positioned within said desiccant and throughout said desiccant enclosure, wherein said plurality of second thermally conductive structures are heated by said heating element during heating and reactivation of said desiccant, and wherein said plurality of second thermally conductive structures transfer heat from said heating element to said desiccant wherein the first thermally conductive structure has a porous design. a battery pack, comprising a battery pack enclosure configured to hold a plurality of batteries; and a dehumidifier assembly, comprising: a desiccant enclosure; a desiccant contained within said desiccant enclosure; a first air passageway coupling said desiccant enclosure to said battery pack enclosure, wherein said first air passageway allows water vapor to pass from said battery pack enclosure and into said desiccant enclosure where said water vapor is absorbed and adsorbed by said desiccant; a controller configured to estimate when said desiccant loses absorption/adsorption efficacy, wherein said controller is further configured to output a first control signal when said desiccant loses absorption/adsorption efficacy; a heater assembly, wherein said heater assembly is configured to heat and reactivate said desiccant within said desiccant enclosure upon receipt of said first control signal, wherein during heating and reactivation of said desiccant moisture is released from said desiccant; and a second air passageway coupling said desiccant enclosure to a volume of air outside of said battery pack enclosure, wherein said moisture released during desiccant heating and reactivation passes through said second air passageway; characterized in that said heater assembly further comprises a heating element held apart from the desiccant by a first thermally conductive structure, and a plurality of second thermally conductive structures that are positioned within said desiccant and throughout said desiccant enclosure, wherein said plurality of second thermally conductive structures are heated by said heating element during heating and reactivation of said desiccant, and wherein said plurality of second thermally conductive structures transfer heat from said heating element to said desiccant wherein the first thermally conductive structure has a porous design. a desiccant enclosure; a desiccant contained within said desiccant enclosure; a first air passageway coupling said desiccant enclosure to said battery pack enclosure, wherein said first air passageway allows water vapor to pass from said battery pack enclosure and into said desiccant enclosure where said water vapor is absorbed and adsorbed by said desiccant; a controller configured to estimate when said desiccant loses absorption/adsorption efficacy, wherein said controller is further configured to output a first control signal when said desiccant loses absorption/adsorption efficacy; a heater assembly, wherein said heater assembly is configured to heat and reactivate said desiccant within said desiccant enclosure upon receipt of said first control signal, wherein during heating and reactivation of said desiccant moisture is released from said desiccant; and a second air passageway coupling said desiccant enclosure to a volume of air outside of said battery pack enclosure, wherein said moisture released during desiccant heating and reactivation passes through said second air passageway; characterized in that said heater assembly further comprises a heating element held apart from the desiccant by a first thermally conductive structure, and a plurality of second thermally conductive structures that are positioned within said desiccant and throughout said desiccant enclosure, wherein said plurality of second thermally conductive structures are heated by said heating element during heating and reactivation of said desiccant, and wherein said plurality of second thermally conductive structures transfer heat from said heating element to said desiccant wherein the first thermally conductive structure has a porous design.