PREDICTING OF A BATTERY ISSUE OF A VEHICLE WITH MULTIPLE BATTERIES

A battery device removably connectable at least to a first battery and a second battery is described. The battery device includes processing circuitry configured to determine a battery health condition of the first battery based at least in part on a plurality of first data samples, a plurality of second data samples, a plurality of third data samples, a plurality of fourth data samples, and a first spread. The plurality of first data samples is associated with the first sensor and a first electrical parameter of the first battery. The plurality of second data samples is associated with the first sensor and a second electrical parameter of the first battery. The plurality of third data samples is associated with the second sensor and a third electrical parameter of the second battery. One or more actions are performed based on the determination of the battery health condition.