The first thing you should always do is try a different battery if fresh out of the box one of your vape carts is not working. This usually solves the issue as it is most likely a pin alignment issue and the change of battery can solve that. Additionally you can try adjusting the pin position yourself using the below graphic for reference.
Storage Tips: When storing your carts its always best to store them upright. If being left for a long period of time they should be left in a dark room temperature location.