We just spent about RM300 to change a bigger alternator for hubby's car. It is because the new battery "kong" after less than 2 months of using it. At first the car mechanic thought that it might be the wiring problem and referred us to the auto wiring mechanic. After the check-up, the auto wiring mechanic diagnosed that the car needs a bigger alternator. So, if your new battery goes out very fast, upgrade to bigger alternator.