Failed battery, or alternator is overcharging.
Overcharging.
A car battery in any car would drain due to a short in the electrical system.
poss alternator fault
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.
Yes. The charging causes a chemical change in the electrolyte of the battery.
Could be a few things, weak alternator, bad battery, bad wiring. If you have a subwoofer in your car with no battery cap that will certainly do it.
A short in electrical system within the battery where two cells short together.
A spark, a ruined battery and possible an exploding battery.
Check the battery and the connections to the engine.
when you stop and when the braking of the car causes the battery to recharge
corrosion of copper, from battery acid vapors, most likely.