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.
Here is one of over 300 results for a site search for "LMTV Batteries".
http://www.steelsoldiers.com/showthread.php?78168-LMTV-and-Four-Batteries-in-Series-Parallel/page2
It would help the members and the forum if you refrained from posting guesses.
They have 4 batteries.
A simple search for LMTV batteries, should have found your answer.