Go to an auto parts store that will give FREE battery & alternator tests. if both are confirmed good. suspect a parasitic or phantom drain. meaning, even if the the car was turned off (no key in ignition), there's a load (in addition to computer, radio, security system memories= these have neglible draw) which is still drawing current from the battery.
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Go to an auto parts store that will give FREE battery & alternator tests. if both are confirmed good. suspect a parasitic or phantom drain. meaning, even if the the car was turned off (no key in ignition), there's a load (in addition to computer, radio, security system memories= these have neglible draw) which is still drawing current from the battery.