Q: At the end of a case, we wrote that we had 1 battery left on 5B. Now we have unlocked another card that tells us to unlock card 5B. How many batteries should we start this game with?
A: It depends on what case you are starting right now. You will ADD to the 1 you had left. The card that told you to unlock card 5A will also tell you how many batteries to add to it.

Q: Our battery count is now at 0. Should we return Card 5 and the card with the item the batteries powered?
A: You cannot use the battery-powered item when you have 0 batteries, but there are multiple cards in the campaign deck that give you batteries. We would recommend you leave the battery-powered item card unlocked in case you do receive more later.