# Quick Answer: Why Is A 12 Volt Household Battery Harmless But The Shock From A 12 Volt Car Battery Will Kill You?

## Is 11.9 volts enough to start a car?

The Minimum Voltage Range To Start a Car In general, while both the engine and the generator are in the working state, the voltage of the battery should be within 13.7 – 14.2V.

If more, then it is harmful to the battery, if less, then it is not fully recharged..

## Can you get electrocuted from 12v?

12 volts DC is not a shock hazard. You can’t touch the wires in your 120V AC household electrical system without getting a nasty, dangerous shock, but you can touch bare wires carrying 12V DC in your car, even lay your hands across the positive and negative 12V battery terminals, without risk of electrocution.

## Is it OK to touch car battery terminals?

It’s okay to touch both terminals of a car battery with your hands. The resistance in your body is so great that you barely complete a circuit, so you won’t feel a thing. … So just be real careful about what your wrench touches when removing the positive battery terminal. If you don’t touch metal, you’ll be fine.

## Why do 9v batteries shock your tongue?

When we held the 9V to our tongue, about 1-2mA was flowing between the terminals. Because the tongue consists of a thin membrane with nerve endings near the surface, we could readily feel the current as it excited the nerves. Anything higher than 9V could be potentially dangerous to our poor tongue.

## How many volts should a 9 volt battery have?

Registered. According to the Energizer Battery Application Manual, a new 1.5V cell typically has an open circuit voltage of 1.58V. A nine volt battery has six cells, so a new would have an open circuit voltage of 9.48V. A reading of 9V indicates a battery with no to less than 10% discharge.

## Do you hook up red or black first?

When you connect the battery, connect the positive end first. Here is the order: Remove black, remove red, attach red, attach black. Ensure that the connections on both end are secure by trying to move the battery around.

## How can you tell if a 12 volt battery is still good?

If your battery is reading 0 volts, chances are the battery experienced a short circuit. If the battery cannot reach higher than 10.5 volts when being charged, then the battery has a dead cell. If the battery is fully charged (according to the battery charger) but the voltage is 12.5 or less, the battery is sulfated.

## What happens if you get a battery wet?

Leakage of water inside the battery casing could cause rapid oxidation of metal contacts within the battery. Oxidation could cause an increase in electrical resistance, significantly reducing the performance of the pack, especially at high currents. Additionally, water could compromise the battery management circuitry.

## At what voltage is a 12 volt battery considered dead?

For a 12 volt, leadacid battery, the voltage measured between these two points should be between 11 and 13 volts. The closer the voltage is to 13 volts, the closer the battery is to being fully charged. The closer the voltage is to 11 volts, the closer the battery is to being “dead”.

## Can 12v DC kill you?

Why is a 12-volt household battery harmless, but the shock from a 12-volt car battery will kill you? The shock from a car battery will not harm you. … Sparks (arcing) between a car battery terminal and other metal parts can cause the metal to get hot enough to burn you.

## Is 24 volts DC dangerous?

It is perhaps worth noting that 12/24V DC is just as deadly as 120/240V AC. There’s naught deadly in voltage, it’s the wattage that electrocutes you. A static shock is 6kV, as I recall, but the amperage is low enough that it doesn’t hurt at all.

## Is licking a 9 volt battery dangerous?

You can lick a big honking D battery until your tongue is dry. Not much will happen. But if you lick a rectangular 9-volt battery, touching both the positive and negative terminals, you will receive a small electric shock. Truth be told, it’s not really bad for you, just mildly alarming and unpleasant.

## How many volts is dangerous?

30 voltsIn industry, 30 volts is generally considered to be a conservative threshold value for dangerous voltage. The cautious person should regard any voltage above 30 volts as threatening, not relying on normal body resistance for protection against shock.

## Can ad battery shock you?

The common household batteries (AAA, AA, A, C, D) all produce about 1.5 volts, which isn’t enough to generate a noticeable current through your body. Batteries also produce DC (direct current), which can cause burns if the current is high enough, but only AC (alternating current) can cause shocks.

## Can 24v DC kill you?

24V can be fatal, but you have to be both wet and very unlucky indeed. Resistance from hand to hand, wet, is about 1 kilohm, so 24V can push about 25mA through you, which is just above what’s required through the heart to do nasty things.

## What happens if you connect the terminals of a battery?

Take a look at any battery, and you’ll notice that it has two terminals. … If you connect a wire between the two terminals, the electrons will flow from the negative end to the positive end as fast as they can. This will quickly wear out the battery and can also be dangerous, particularly on larger batteries.

## Can 120 volts kill you?

Ordinary, household, 120 volts AC electricity is dangerous and it can kill. … We can use a simple formula to calculate the current: Current in Amps = Voltage in Volts divided by Resistance in Ohms. Using electrical tools or equipment in wet areas can be a hazard.

## Can 9 volts kill you?

To kill a person, an electrical shock has to pass through the heart causing arrhythmia. Even if it entered the body, a 9 volt current is not strong enough to cause arrhythmia. But also, it never actually enters the body. Lick a 9 volt battery.

## Can DC current kill you?

The current may, if it is high enough and is delivered at sufficient voltage, cause tissue damage or fibrillation which can cause cardiac arrest; more than 30 mA of AC (rms, 60 Hz) or 300 – 500 mA of DC at high voltage can cause fibrillation.

## What happens when you connect car battery wrong?

A rapid spike in the electrical power from the donor battery will damage the dead battery and the vehicle’s electrical systems. Jumper cable wires are not designed to take on a lot of heat and placing the cables wrong will melt its insulation exposing the bare wire.