Batteries are energy stores or reserves. In dreams, batteries represent your heart. Just as a battery powers a machine, so too does your heart power your physical body. Examine the condition of the battery in the dream and its action. Relate this dream symbol to the other symbols in your dream to gain a better understanding about what this dream is telling you about your heart. Often dreams about the heart indicate a need to open up your heart to love, compassion, and empathy.