How to Diagnose Battery Drain Issues on a Bobcat T770 skid steer?

[EarlConde17]

Hey everyone, does anyone have a good process for tracking down battery drain issues on a Bobcat T770 skid steer? Seems like the battery keeps losing charge even after sitting for just a day ortwo, and im curious what the most common culprits are..

 

[Big_Iron]

Have you check the alternator and any aftermarket accessories? I've seen GPS units, radios, and even a bad relay slowly drain batteries. A quick parasitic draw test with a multimeter can save a lot of guessing.