This is because each time the battery is disconnected, the computer in the car loses power. When the new battery is hooked up, the computer system needs to be reset to stop the lights from blinking.
They plug in
Because it is suppose to start if the battery is hooked up.
the alternator
yes
The meter on your battery charger will be in the green
A battery hooked up back wards can fry all sorts of electrical components. Every thing from fuses, to wires, to computers.
energizer
Yes
Chemical energy in the battery is turned into electrical energy when the battery is hooked up to an electrical circuit.
You hooked up the wires backwards on the starter go in and change them. That or you got the wrong starter.
There's no set answer to that, it depends on the battery chemistry, how much the battery has been used since full, and what the battery is hooked up to. But basically, when new, every battery, when hooked up to a modest load, will have a tad more than the rated voltage - in this case 9 volts.
Because they are not hooked up to a battery wire they are only hooked up with an ignition wire.