it may actually be a charging system issue. when your car is running check the voltage on the battery. if it isnt 14v+ then the charging system isnt doing its job.you can also remove the alternator and take it to a parts shop to be tested. if it isnt an alternator then it is probably a parasitic draw, which means something is drawing power even when the car is off.

A short somewhere may be draining the battery. It could be as simple as a bad tail light.

Either an alternator or battery drain problem. Read this on how to test for battery drain.

http://ricksfreeautorepairadvice.com/bat...

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juicy willy

Car problem. I own a 2010 Toyota Corolla. The battery died so we had just changed it. It was working fine we had it fixed. I used it for two days, then did not use it for around a week. The car wouldn't start again. Any ideas?