Yes. The charging causes a chemical change in the electrolyte of the battery.
no
yes.
Chemical.
When charging a car battery, the red positive cable should be connected first.
charging system not charging battery with new batttery, alternator and fuel pump. what will make that happen ?
i tink that it is a physical change
The batteries are undergoing a chemical change, particularly during the charging process when hydrogen and oxygen gases can be generated. This happens as a result of electrolysis of water within the battery, leading to the production of these gases which can form an explosive mixture if not properly ventilated.
only if the car your using to charge the other on is not started
Charging a car battery without disconnecting it usually won’t damage the alternator, as long as you’re using a proper charger and connecting it correctly. Modern cars are generally designed to handle this safely. I’ve done it myself a couple of times, and when I asked at Bergman’s Auto Repair, and they explained it really well. They said the key is using a quality smart charger to avoid voltage spikes, and they even checked my charging system to make sure everything—from the alternator to the battery—was working properly. What stood out was how thorough they were, not just answering the question but making sure there were no underlying issues. So yeah, it’s safe in most cases—but getting advice and a quick check from a place like Bergman’s Auto Repair gives you extra confidence you’re not risking any damage.
No.
No
Yes, as long as the charging system is is good working order.