Toyota RAV4 battery issues after replacing three batteries, potential low mileage concern on Toyota RAV4

Some Toyota RAV4 owners report experiencing ongoing battery drain issues even after replacing multiple batteries, indicating potential underlying problems with the vehicle's electrical system. These owners often find that opting for low-quality replacement batteries results in shorter lifespans and recurring issues, highlighting the importance of using high-quality options. Additionally, some report that battery drain problems persist even after a Data Communication Module (DCM) update, suggesting that damaged batteries may require independent replacement for reliability. Known faults, such as the DCM failing to shut down, can also contribute to battery drain, making it crucial to ensure that necessary software updates are applied. Furthermore, some owners emphasize the importance of conducting battery tests, like load tests, to assess capacity and health, as low capacity can lead to rapid drainage and operational problems. In cases where multiple battery replacements fail to resolve the issue, further investigation into the vehicle's electrical system is essential to effectively address these recurring battery concerns.