[HELP] weird battery problem

Car appeared to have run out of battery, now would not start.



Symptoms:



1) When the battery is connected to the car and I tried to charge the battery with a 12V battery charger, the battery would not charge, there is "click-click-click" noise coming from around/under the fuse box.



2) Disconnected the battery from the car, fully charged battery with charger. After re-installed/reconnected the battery to the car, again same "click-click-click" noise from around/under the fuse box.



Tried with two batteries and same thing. :mad:



Anyone?



Thanks