With a battery charger or alternator.
how Can you charge multiple 12 volt batteries with a car?
No, it is not necessary to disconnect the batteries.
Yes, if the batteries are rechargeable
The pad can charge as many batteries as it is destined to charge. Most pads charge about 4 batteries at a time.
NO!
Batteries importance is in their inherent capability to store an electric charge.
Batteries charge nothing they hold a charge.
if they are rechargeble batteries then yes you can but they wont stay charged for that long
I am sorry, but I think that this is impossible. It must have batteries to function.
False assumption.
they don't i have left batteries on concrete for months and had on loss of charge.
Wii remotes run on 2 AA batteries but if you can get a pair of recharable batteries then yes you would need to charge them. (Pick your brand carefully, some batteries run out fast!)