no it can't
no
No
Depends on the battery. It is listed on the battery as Cold Cranking Amps (CCA).
All Harley Davidson motorcycles have used a 12 volt battery since 1965. Prior to 1965 they used a 6 volt battery.
A 12 volt automotive battery has six cells.
Not on any modern car with a 12 volt system.
A 3 volt battery is a battery that produces 3 volts. Many watch batteries produce 3 volts.
Many digital cameras use a 6V battery. They're also used in blood-glucose meters, blood pressure cuffs, flashlights, and lanterns.
No, an automobile battery charger outputs 12 Volts. This is far too many volts to charge a 5 Volt battery. You would destroy the 5 Volt battery with this charger.
NO.
12