A "battery disconnect" is nothing more than a special SWITCH designed and manufactured to be able to carry very large [heavy] electrical current. The one with which I'm familiar mounts on the positive battery terminal after the cable has been removed, and then the cable connector is attached to the output terminal of the disconnect switch. This switch allows one to totally and completely "kill" the battery voltage to the auto circuits, without having to use a wrench to loosen a battery terminal clamp and manually "wrestle" it from the terminal.
disconnect then reconnect the battery
HEY BEEVIS....NOTHING will work after you disconnect the battery......DUHHHHH !!!!!
You may have to disconnect and recharge your car battery for your car stereo to work again.
Disconnect the battery. this should work.
Disconnect the negative battery cable.
Disconnect the battery for 5 minutes, then reconnect it. It should work after that.
Best to unplug it and then disconnect it from the battery. Reason being is that if you disconnect it from the battery first you will create a spark. That spark could ignite any fumes from the battery.
Yes, you better disconnect the negative battery cable.
If working on the electrics of a car then it is a sensible precaution to disconnect the battery.
If you disconnect a battery cable the preset radio stations and the clock has to be reset
It would be best to disconnect the battery but removing the fuse will also work as long as you are careful not to disrupt other hot wires while working in the dash.
It does no harm to disconnect the battery when working on a vehicle but in general no, you do not need to disconnect them to change a filter.