There is no need to have a memory saver when changing car battery. All types of batteries can be changed without using a memory saver.
No, disconnecting the car battery does not ruin the ignition. The car will still start, but it may take a little longer to start.
Yes, jumper cables can be used as a memory saver. By connecting one end of the cable to the power source and the other end to a device that needs power (like an electronic device), you can preserve battery life by not having to worry about constantly swapping cables.
First of all, make sure to remove any old or damaged batteries from your car. Next, connect the new battery to your car’s power outlet and turn on the car. If everything is working correctly, you should see a green light coming from the battery. If not, you can try turning on the car’s air conditioning or heater to check if there is a problem.