לצפייה בתמונה
If you're still unsure about what's happening, try these steps:
1. Take any battery you have at home.
2. Drop it gently onto a flat surface, just like in the video.
3. A good battery will 'stand' while a dead one will topple and roll over.
Neat, right?
*In accurate expression search should be used in quotas. For example: "Family Pure", "Rabbi Zamir Cohen" and so on