Abstract: A battery system includes a housing, a battery array inside the housing, a first wiring path that bypasses the battery array, and a second wiring path electrically connected to the battery array. The battery system is adapted to charge a battery pack of an electrified vehicle using AC power, DC power, or both.

Abstract: A battery system includes a housing, a battery array inside the housing, a first wiring path that bypasses the battery array, and a second wiring path electrically connected to the battery array. The battery system is adapted to charge a battery pack of an electrified vehicle using AC power, DC power, or both.

Abstract: A charge test device lacks ability to provide electrical power for charging an electric vehicle. The test device is configured to communicate, with the vehicle, communications which electric vehicle supply equipment (EVSE) having the ability to provide the electrical power for charging the vehicle would communicate with the vehicle to initiate charging of the vehicle. The EVSE may be DC fast charge EVSE having the ability to provide electrical power for DC fast charging the vehicle. The test device may be further configured to indicate responses of the vehicle to the communications communicated with the vehicle such that diagnosis of a failed charge event of the vehicle by the EVSE can be performed using the responses of the vehicle to the communications communicated with the vehicle.