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, the battery device comprising processing circuitry, a first sensor and a second sensor, the first sensor and the second sensor being in communication with the processing circuitry, the processing circuitry being configured to:

• determine a battery health condition of the first battery based at least in part on:
• a plurality of first data samples and a plurality of second data samples, the plurality of first data samples being associated with the first sensor and a first electrical parameter of the first battery, the plurality of second data samples being associated with the first sensor and a second electrical parameter of the first battery;
• a plurality of third data samples and a plurality of fourth data samples, the plurality of third data samples being associated with the second sensor and a third electrical parameter of the second battery, the plurality of fourth data samples being associated with the second sensor and a fourth electrical parameter of the second battery;
• and
• a first spread associated with the plurality of first data samples and the plurality of third data samples;
• and
• perform one or more actions based on the determination of the battery health condition.