First rookie question...I bought a couple lithium storage explosion bags to store them in since I'm storing them inside my home. Is that likely to sweat on the inside of the bag possibly doing the battery damage? Second rookie question.... I've read in this forum that these batteries emit harmful chemicals but I don't know if the EGO tech was referring to when they're being charged or during heavy use or ONLY if damaged? When I bring the charger in the house out of the cold I do notice a mild odor.