No, it will destroy the 3 volt device.
www.batteryinternational.com should have a 12 volt battery that will work for you. Hope that helps
no
No it will not work
A 12 volt battery charger is designed to charge 12 volt batteries.The answer to the Related Question explains how any battery charger works.
Yes, as long as it will fit in the space provided.
Install a 3 volt battery and forget any modifications. It will not operate on 12 volts.
no
No, 12 volts means 12 volts. Anything less will not work and anything more will not work.
No, even if it can fit, the tool will not have sufficent power.
12 volt
The voltage of 120 volts is more common that the lower voltage of 12 volts.