i hope i haven't been stupid. they discontinued my fav mod, the sigelei sobra. prices are dirt cheap. i use these because i'm lazy. as soon as i put batteries in, the screen goes to watts, so i can ignore everything else. i fiddle with watts a bit n then i never have to deal with any silly options. anyway, i now have 7. i'd like to put away 3 as back ups. i was assuming the electronics stay new as long as the mods are never used. is this correct, or will they deteriorate in storage?