Battery drain

Hello,

Sounds like the vehicle have excessive parasitic draw (current drain).
Typically, this points to a faulty electrical circuit or something staying on like a glove box or cargo area light etc.
To find out where is the excess draw is coming from you will need a multimeter and check the battery drain.

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Take a look at his video, it shows how to find the parasitic draw:

https://youtu.be/z5F7WpgjaRs

https://www.2carpros.com/articles/car-battery-dead-overnight

Please let me know of any questions.
Thank you.