4 aa batteries
You can recharge a AA battery if it is a rechargeable battery like the 12 volt battery in your vehicle. You can buy a rechargeable AA battery or one that is not rechargeable they just cost more money.
I will say no. I did install regular alkaline batteries and they died very soon and started to leak.
yes
A good AA battery has about 1.5 volts across it.
An AA battery will sink in water.
One AA battery would suggest a small motor, with a small drain. Anything metallic thicker than a hair would do.
When you are searching for the AA battery for any device that you need it for, you will need to ensure that the proper technology is utilized. Don't start buying batteries of the wrong size for your electronic things, since this can lead to them breaking and being not nearly as useful.
My Canon SX10 was instantly displaying a message to "replace the batteries" the first time I tried to take a picture, even after replacing the AA's with new adn verified strong AAs. I was almost ready to give up when I heard that it might have to do with the coin backup battery and not because of the AA's. I replaced with new CR1220 and that solved my problem.
Battery may have a dead cell and need replacing.
What are the ingredients in a AA battery?
No.