Store Lipos in a closet in your house? I have read to many stories about them catching on fire to be storing them that way. Our planes are always crashing so the Lipos get damaged. How can you tell when a Lipo has been damaged and presents a problem? I don't know. Yes, our cell phones also contain Lipos, but at least they do not crash often and have the batteries rolling all over the place. Someone at the field told me yesterday that they had to return a Lipo for possible warranty and that he was instructed to ship it in a fire safe bag or container. That is what people who most likely know Lipos are advising. I saw a model helicopter with Lipos take off and in a few seconds catch on fire, right in front of me, at our field. I feel I don't know enough about the use of Lipos not to be super careful with them.