It depends upon the amp hours of the 6 volt battery. The higher the ampacity of the battery the longer it would take. I hope that this is a hypothetical question because why would one want to fry a battery.
A very, very, long time with direct sunlight. Charge your battery with a battery charger
A .6 amp charger is a trickle charger. It would take days to charge a dead 12 volt battery with this charger. You need a 10 amp charger which will charge it in a couple of hours.
Yes, but it will take a very long time if the battery is dead.
How long does it take for an 18v battery to charge
It would depend on the condition of the battery.
No, the charger pulls so very little power as to not be an issue unless the car was not run for a long period of time. It would take a very long time for the charger to drain the battery.
Depends on the amperage of the charger. A 10 amp charger will charge it in about 1 hour.
Around 4 hours on a dead battery.
About 2 hours if the battery is 100% discharged.
At least 24 hours and possibly longer depending on how low the battery was.
Depends on the battery's mAh rating and what the charger's mA rating is. Say the battery is a 1000mAh Lipo battery and the charger puts out 500mA, the battery will charge in 2hours.
This depends on what kind or charger are you asking about and what kind of battery are you charging. My Phone charger takes two hours to charge my phone.