* Short Circuit: Connecting two car batteries directly with a metal screen creates a massive short circuit. This will cause an enormous amount of current to flow between the batteries, potentially causing:
* Battery Explosion: The extreme heat generated by the short circuit can cause the batteries to explode, spraying corrosive acid and potentially causing serious injury.
* Fire: The heat and sparks from the short circuit can easily ignite nearby materials, starting a fire.
* Damage to the Batteries: The batteries will be severely damaged and likely unusable after the short circuit.
* Risk of Electrocution: Touching the screen or any part of the circuit during the short circuit will result in a severe electric shock, potentially fatal.
Instead of connecting batteries with a metal screen, you should always use proper jumper cables and follow these safety precautions:
* Connect the positive (+) terminals first, then the negative (-) terminals.
* Ensure the cables are properly clamped to the battery terminals.
* Never touch the metal screen while the batteries are connected.
* Disconnect the negative terminal from the 'receiving' battery first, then the positive terminal.
If you are unsure about connecting batteries, please consult a qualified mechanic or electrician.