This back up will help you charge your laptop , phone or any other electrical device in any emergency .
Step 1: What to Do
Connect 11 9 volt batteries in a series pattern. (as shown in the video attached).
Step 2: Adding a Switch
connect the positive of the battery to any side of the switch, using another wire connect the other side of the switch as shown.
Step 3: Inserting a Point.
take a point and connect the positive wire passing trough the switch in one of its end and the other side of the point to the negative side of the battery as shown .
Step 4: How Does It Work
in this video i will show you how does it work .