Abstract: A portable battery charger having a housing surrounding an L-shaped frame on wheels, the bottom portion of the frame supporting a battery. Within the frame is a battery charger connected in charging parallel relationship to the battery. Jumper cables are connected through the housing to the battery and intermediate portions of the jumper cables and electrical supply cable within the housing are yieldably retracted by disc-shaped weights into parallel vertically disposed compartments. An electrical tilt alarm is provided to prevent spillage of electrolyte.