If you are talking about a car engine and battery then it is not the battery that is clicking. It is in all probability the solenoid.
It means your battery is dying
your battery is either lose or dead check that
It could be a dead battery.
jump start the car and get a new battery and if it isn't the battery it could be the alternator or both, but try a new battery first
It can very well be the battery. Takes almost no amperage to operate a radio. I would suspect it is either the battery or the battery connections.
It could be, a dead battery, loose or dirty battery connections, a faulty starter,
Your battery is not giving enough power to start the car. It may be battery, alternator, voltage regulator or bad cables.
Somthings wrong with the engine.
It means that there is something wrong with the engine and not the battery
Your question is confusing. If the engine cranks it is turning over.
Is the new battery well charged? Is the starter bendix stuck? Is the starter ring stuck?
battery or corroded connection on battery One click most likely is a bad starter motor or solenoid. Many clicks battery or connection problem.
Never disconnect a battery while an engine is running!
Try a new battery, or get a jump start. Sometimes there is not enough power in the battery to start the engine.
Weak battery Loose or corroded battery cables
The wrong spark plug wire(s) can cause engine problems including not running but won't drain the battery.
You just popped it.
It could be anything from the engine to the connectors
ussaly when your guinea pig clicks its becase somethings wrong or they want to be picked up
If your engine does not turn off by the key I suggest disconnecting the battery and alternator and immediately fixing what is wrong
Have someone that you know that knows about cars check the starter cellanoid.
Check the battery. If there isn't enough of a charge in the battery it could be a faulty battery or a faulty alternator. If you have a meter, test the voltage across the batttery terminals, it should show slightly over 12 volts and when you attempt to start the engine it should not drop more than 1 or 2 volts. If that's the case, have someone help you jump start the engine and take the vehicle to a shop or to an auto parts retailer who can thoroughly test the charging system for you.
One of a few things depending on the click. If it makes consecutive clicks when you turn the key (click,click,click,click) then the odds are the battery is dead or in need of charging and there just isn't enough charge to fully engage the starter and turn over the engine. If it clicks just once, the selenoid is usually bad, or the starter is "locked" and will need to be replaced.
I would check your alternator*(check the spelling).