Check how many Load ampere did your car consume when in stand by or key is off. use a DMM that has a 20 A DC meter. Remove the negative terminal of your car battery , test probe the battery terminal and negative wire for battery. Take the reading, if it is 1amp or more, there is something wrong with your car, if it is only around 100mA no problem, probably your battery acid is not good, or the battery it self is bad.
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