A battery lockout device is provided. The battery lockout device may include a safety plug body adapted to engage a power port of the battery. The battery lockout device may further include a rotating member operatively connected to the safety plug body, the rotating member engaging a battery lip or battery lip housing. The rotating member, in a first rotated position, can be locked in the first rotated position preventing access to the power port of the battery and preventing removal of the safety body plug from the battery. To effectuate locking the rotating member in the first rotated position, a keyed lock can be used to maintain the first rotated position of the rotating member relative to the safety plug body and the battery/battery housing lip. In this way, no energy from the battery may be discharged until removal/disengagement of the battery lockout device.