Research suggests that there are, on average, 25 battery operated appliances in a typical household. because batteries contain toxic heavy metals, we should be thoughtful about their use. what is the least acceptable behavior when it comes to battery use and disposal? a) take used batteries to a company that correctly disposes of them. b) use only electrically powered appliances and drastically reduce battery use. c) use rechargeable batteries, keeping harmful battery wastes out of the environment. d) take used batteries to a recycling plant so they can be used for some other purpose.