Distilled water is preferred and recommended in a non sealed battery.
Tap water, with the minerals in it, should not be used unless you had to.
Any hot wire. Usually the are a couple terminals for an accessory in the fuse box. Can attach there, tap an existing wire or go direct to batt. Should be keyed power source is preferable since cannot stay on when car off.
Any 12 volt car battery can go into any modern car. so yes
Mostly you will see it bolted to the engine.
if anything is running off the battery (visibly on) the battery will eventually go dead
Yes, you can definitely buy a car battery online. There are many dealership websites that you can visit online to purchase a car battery and there are many auto stores that you can go online to purchase a car battery.
The price you will pay for a car battery, will depend on what type of battery you want. you can buy a no name battery, or you can go with a brand name battery. Which would cost you more
you should go to a car shop and get your battery checked and ask how long should u charge your battery.. or if you should get a new battery
Tap water is the best water for betta fish! There is no need to go out and buy expensive betta fish water...it's no different then tap! If you want to be sure that the tap water is safe for your betta, put in some sort of conditioner for the water.
A storm has nothing to do with the battery going dead.
Yes
Go get a new battery using another car. Or get the dead car jump started using another vehicle. There are companies that have mobile battery services that will come right to your home or wherever the car is located and replace the battery.
Dont put water into a battery you can go and get acid fluid for the car batteries from napa schucks and other stores but do not fill it with water. The acid fluid is only like 12$