What happens when you disconnect positive terminal first?
It can fall across either terminal and the car and nothing will happen. If you disconnect the positive terminal first and you drop a spanner, it is possible for it to fall across the positive terminal and any earth on the car, with spectacular and possible dangerous results.
Is it bad to disconnect positive battery terminal?
Why Disconnecting the Positive Terminal is Unsafe When you disconnect either cable from the battery terminal, you effectively have broken the circuit and the result is the same either way. A car battery’s negative terminal has a cable that runs from it to the frame of the vehicle.
What happens when you connect positive to negative?
Connecting the positive terminal of each battery to the negative terminal of the other battery will result in a huge surge of electrical current between the two batteries. The heat can melt internal and external battery parts, while the pressure from the hydrogen gas can crack the battery casing.
Can I start car with battery charger attached?
If your answer is yes, you can now begin charging your battery. Even though there is no risk of overcharging with the use of a high quality charger, the battery should not remain connected to the charger for more than 24 hours. …
Can a trickle charger ruin a battery?
Leaving a battery connected to a trickle charger for too long can lead to overcharging, causing damage to the battery. Although they can’t recharge a dead battery, they can be used frequently and left connected to a battery without any risk of overcharging.
Is it safe to leave a trickle charger on all the time?
Some trickle chargers can safely be left connected for months without doing harm to your battery, providing an easy long term battery maintenance strategy. Others may only be left connected for a few days at most.
Can you leave a battery tender on all the time?
In theory, you can leave the Battery Tender® Plus battery charger connected to a battery forever. That’s a really long time. Sales people like to say, “Just plug it in and forget about it!” However, practically speaking, it is a good idea to check on the battery at least once every couple of weeks.