Assuming you are talking about car batteries, the most common reason is that they are either dead or fried.
The most common reason UPSes fail, in our environment, is the batteries go bad.
One reason that your remote key will not unlock your Mazda 6 is that a fuse is blown. You may need to replace the batteries in the remote or reprogram the remote. A bad body control module is another reason the remote will not unlock the doors.
If they are recycled properly, no, they are not bad for the environment.
poison
Bad doctor
it is bad to trow batteries away because it will go in to the ground and the plants will die.
The most common reason a flashlight might not light is that the batteries are dead or incorrectly inserted. If the batteries are working properly, another possible reason could be a faulty bulb or circuitry within the flashlight.
According to various toy websites, the Nerf Big Bad Bow does not require batteries.
yea batteries is legal in Mexico it can really mess you up
Yes, it sure will especially if it has a dead cell.
if all your batteries are good and charged up you have a bad speed solenoid if your cart is older than 1993. But, if its a newer cart you could have a bad controller box. Make sure your batteries are good, it only takes one bad cell in one battery to mess things up sometimes
Generally it is bad to leave batteries in anything battery operated for long periods of time. I have ruined more than one useful thing because I left batteries in until they started to corrode. In the case of paintball guns, leaving batteries in is essentially the same as leaving a low grade weapon around for anyone to use or misuse. You can do damage with an improperly handled paintball gun.