Cadillac DTS battery replacement issue with new battery failing after four hours on Cadillac DTS

Some Cadillac DTS owners report experiencing rapid battery failure, with new batteries draining after only a few hours. This issue may be attributed to parasitic power draws from malfunctioning components or interior lights that continue to draw current when the vehicle is off. Additionally, a faulty alternator or charging system can lead to quick battery depletion, necessitating a thorough test of the alternator's functionality. Owners are also advised to properly test the new battery's voltage and capacity to ensure it holds a charge effectively. Utilizing a diagnostic scan tool can help identify trouble codes related to the Service Battery Charging System, providing further insights into the issue. In some instances, specific model-related problems, such as a defective seat control button, have been known to cause overnight battery drain. If these issues persist, consulting a professional mechanic or Cadillac dealership is recommended for further assistance.