you have a weak or failing battery, NOT uncommon lately, the factory battery should last 3 years but i have replaced batteries on new unsold cars or cars only a year old, now depending on the miles the factory battery MAY be covered under the basic 3 year 36k warranty, you first need to charge the battery with a good battery charger and have it tested, the cars charging system will NOT fully charge a dead or weak battery.
newer cars have so many computers the charging system output must be regulated carefully so as not to damage any computer, and as such the generator (alternator) is no longer designed to recharge a dead battery the battery must be fully charged with a battery charger first
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