Most recycle centers will pay you for the battery.
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You would dispose of such as you do any other battery.
Walmart is a good source for buying a new car battery. They will take your old battery to dispose of for you and knock a little off the price of your new one. Auto places seem to charge a little more for their batteries.
You can take an old car to a salvage yard to dispose of it and earn some extra cash.
To safely dispose of a salt water battery, you should take it to a designated recycling center or hazardous waste disposal facility. Do not throw it in the regular trash as it can be harmful to the environment.
You can dispose them at any oil and gas stations
No, a car battery does not have mercury in it. It would be very dangerous to have mercury in a car battery.
there are lots more amps in a car battery eg there about 1.5 in a flash light and in a car battery there about 300 A car battery is a wet cell battery and a flashlight battery is a dry cell battery.
Drop it off at any auto parts store. If you want to get paid for it you can take it to a battery store.
No merc is not in a car battery
Apart form normal use of the battery, it is possible that the battery is getting old. Most types of rechargeable battery become less able to hold a charge as they age or may indeed have a finite number of times that they can be recharged. This will happen to phone batteries and to car batteries. When this happens you need a new battery and make sure that you dispose of the old battery properly (they contain chemicals that harm the environment).
You can get a new battery, you can jump start the car with jumper cables and another car with a charged battery. You can also put a battery charger on your battery to give it a charge.