Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
I think either will work, but since the two batteries have different loads put on them, it might be better to use 2 x 12v.
Just make sure you know how to hook them up! The one for the 24v (rear) battery should be connected to the + and - terminals of the rear battery, NOT to the vehicle...