What battles are you fighting? Which enemies are ganging up on you, and you have nothing in the reservoir with which to fight?
The best battle is the one you don’t have to fight. His name is ‘Lord is Mighty’. He is your warrior, and He fighting your battles.
He is with you, just as He was with Jehoshaphat.
Jehoshaphat was [rightly] terrified and cried out to God, and God responded. Through the prophet, God told Jehoshaphat he will not need to fight. Instead they were to stand and watch as El Gibhor, Mighty God stepped in the battle.