If they are recycled properly, no, they are not bad for the environment.
poison
Model shops which stock rc cars also stock the batteries that they need. Some of the smaller, lighter cars do not require battery packs and run off AA batteries which are easily available on the high street.
it is bad to trow batteries away because it will go in to the ground and the plants will die.
the duracell batteries have probably gone bad. If you bought them recently, you might have bought them bad right off the shelf. technically, they should last you about time and a half in the camera. also, if you use the batteries for a while and then stop using them and let them sit at a discharged state for a couple months or more, the batteries will go bad. they may take a charge but they will be unable to hold the charge.
That high pitched noise is probably a warning signal. You probably put the batteries in backwards or put in the wrong kind of batteries. make sure they're the right type and all oriented properly.
According to various toy websites, the Nerf Big Bad Bow does not require batteries.
Take out the batteries out, replace new batteries, or put the same batteries back in. It will reset the high score on Bop It.
No!
no it will not! timming off will or high idle will.
no!!
yes, batteries have high internal resistance. The higher the resistance the lower power you get out of the batter. Therefore if you no power you have very high resistance.