In the house for mine, Lead acids were a tad cumbersome but the wee LiPo s are no problem they are only 2 and 3S so about the size of the old NiCad race packs of 6 cells and they live in an old army ammo box in an unheated but insulated room (probably gets some heat from the rest of the house. . Was an old bedroom but it is no convertyed into a modeling room. I also keep my 3D printer in there and we have had zero problems with the filament