If you mean like AA or AAA, nothing. Absolutely nothing happens. If they both have an electrical current running, I don't know, it might be dangerous.
I would use my laptop to check emails and such, and the battery, and well, nothing really I wouldn't USE my battery for anything except running my laptop which it already does on its own...
That depends on the age and model of the vehicle. Above is an invalid answer. age has nothing to do with resetting anything, When the car is running and you remove the battery nothing is reset it just keep on running. But if the motor stop and therefore no power many things will rest and yes it depends on the age
If the car is on (Ignition is on, engine is running) then no. Nothing should drain the battery when the car is running, there is a device called an alternator with a belt that usually goes around the crankshaft that transforms the mechanical energy into electrical energy. As long as you have the car running, the battery should not die. If so, you have a mechanical problem.
something else must be running when the car is off besides the clock.
You run the risk of damaging the alternator.
Nothing provided the engine is not started up. With no oil, a running engine would eventually seize up.
your alternator may have went out so the car was running on the battery, once the battery died..... so did the car.
Yes, because a bad coil will not allow the engine to run. But if the engine is running then the coil has nothing to do with the alternator charging the battery.
If you leave the Ingition Switch on without the engine running. The battery will go dead. Then you will have to get a boost or charge the battery to get the engine started.
If the alternator fails, it is no longer keeping the battery charged and your engine is running on nothing but battery power. Once the battery runs down, your engine will no longer run.
Your putting a charge on the battery when its running.