In a car, motorcycle, truck, etc., prevention of overcharging is the job of the voltage regulator part of the vehicle's battery charging system.
If a simple, unregulated, battery charger accessory is used to recharge a battery, it must be disconnected as soon as charging is complete otherwise the battery will start "gassing" - giving off acid fumes along with hydrogen and oxygen gases, which is a very dangerous situation. If allowed to continue the battery would be damaged permanently and there could be a dangerous explosion.
Intelligent battery chargers, which detect when the battery is fully charged, are much safer to use because they shut off the power automatically.
Overcharging. Check your electrical system to see if the alternator is overcharging the battery. It can also be the battery is defective and needs replacing.
The charging process should be stopped once the battery is full to prevent overcharging.
Yes if the alternator is overcharging the battery.
Overcharging.
It usually means that the battery is going bad, and the alternator is overcharging to compansate.
Failed battery, or alternator is overcharging.
Yes, overcharging the battery will ruin it.
Overcharging (bad voltage regulator) or a short circuit inside the battery.
Overcharging or defective battery. They will also crake in freezing temperatures if the battery has lost it's charge.
Reversing the cables when you connect them. Overcharging the battery.
Yes, most definitely.
No. The computer and charger are "intelligent" and will prevent overcharging.