It depend on the capacity of the battery. This question has been expertly answered by others on wiki-answers with explanations of the physics of it.
A few variables are involved like, does the solar panel have a charge controller, what condition the battery is before you start and how much sun is the solar panel receiving.
I don't think so but I think it would be best if it was
If the 12 volt solar panel output voltage is always higher than the 6.5 watt battery voltage. To charge a battery, a voltage greater than the battery must be applied to the battery, otherwise the battery will try to charge the charger.
A very long time. I would guess 48 hours of sunlight at the very least. Even that may not be enough to fully charge the battery. It really depends on how much amperage the solar panel is putting out.
Put the solar panel in the sun;Attach the red wire of the panel to the positive terminal of the battery;Attach the black wire of the panel to the negative terminal.
No set answer to that. It depends on the capacity of the battery, the size and efficiency of the solar panel and the intensity of the sunlight.
To charge any battery the voltage of the input must be more than the battery's output.
use cables to the positive and the negetive.
To answer this question the output current and voltage of the solar panel would be needed.
That depends on the amp-hour capacity of the battery.
A solar cell phone charger is a electrical device, that uses a solar panel to charge a phone battery.
You sure can! I charge a marine battery with a 75 watt panel and it goes from a fairly good discharged state to fully charged in about four days.