Yesterday morning i tried to start my car (cuore) when i insert the key dashboard lights turn on but when i tried to start car starter (sulf) was not cranking and there were voices like computer mouse clicking from the Engine . after 2 or 3 try the starter (sulf) turned on and car started. i drive for 10 minutes all fine and parked car for 2 hours. came back and start car it started fine went to market stop car at 2,3 places car started totally fine.Then outside a shop when i try to start the car same problem occur like morning only mouse clicking sound. tried again again many times but car wont start. since the car is automatic so it cannot be started by pushing. i called electrician he brings new battery with him replaced the battery and car started totally fine without any problem. i went to his shop with him checked the generator of car it was fine too. when when he checked my old battery he said its also in 50/50 condition not very bad and water level in battery is also fine battery was 1.5 years old. now i am confused that was it really the problem with my battery or starter was the culprit. i am driving my car from 2 days now and it is starting fine. i also checked its starter (sulf) mechanic on the base of sound told me that sulf is fine. But i have doubts in my minds that since the battery is new so it is starting fine. may be after a month or two it can again create problem and drain the battery. Expert opinion required please