Granny fans sometimes wonder what a battery looks like. In reality, it's nothing special. It's just a regular box with the word "Battery" written on it.
Description and appearance of the device in Granny
The energy source is rectangular. On the right side, there's the aforementioned inscription. This indicates that it's a power source, and nothing else. The other end, which is smaller at the bottom, contains two contacts. These are the positive and negative poles of the energy substrate.
Below is a photo of the Granny Battery.
Finding something like this would require a lot of searching, but it's quite possible it could be in the attic.
The energy source is inserted into the center of the door.
