It signifies to save money for a purpose or to use the existing facilities for a purpose.
To see a battery in a dream, an external effect that will activate the person, impulses.
This dream sometimes points to an indispensable friend, a guide, and a rich person who opens the horizon.
The battery dream also points to the hidden potential of the earth or human being stored for use when needed.
Inserting a battery in a car in a dream or connecting a device to a battery is a sign of activating the possibilities at hand and the help and support of a friend.