The reason for the battery to loose water is due to the heat, in which the water will evaporate... that is why when you refill water they say to only use distilled water, as the acid is now much more concentrated. A battery that is being overcharged will also loose the fluid.
a bad alternator or battery or both
Overcharging.
A car battery in any car would drain due to a short in the electrical system.
have your alternator check. It is like that for most car. It is not the battery's fault. But you could have a lose connection to your battery.
poss alternator fault
add water and charge the battery
Dead cell in the battery or something is on pulling power from the battery. Light or relay.
Something causes a slow drain on your battery. As it does, your battery slowly discharges. If you know that your car will be not used for several months, you might try disconnecting on of the battery terminals.
Car batteries are filled with sulfuric acid, not water. The battery fluids get "topped up" with distilled water if they get low.
Yes.
No it will not, that is just a myth.
Yes. The charging causes a chemical change in the electrolyte of the battery.