Yes, it has twice the voltage power.
Lr41 batteries are just 12 volt batteries. Any 12 volt battery that you would buy would be a good replacement for this battery in whatever device you are buying it for.
Buying a six volt battery is better than 12 volt. If you buy the 6 volt takes up less power so it holds more.
Charge it with a 12 volt battery charger.
No
12 volt
No, a 12 volt charger will overcharge a 8 volt battery and destroy it.
The battery is a 12 volt.
No
Yes, a 12 volt battery will be damaged if charged with a 24 volt charger.
If you are asking the question, can you charge a 6 volt battery with a 12 volt charger, the answer is no.
No, the battery is DC not AC.
A 12 volt battery charger is designed to charge 12 volt batteries.The answer to the Related Question explains how any battery charger works.