(US4869688-A)      The battery jumper cable comprises electrically insulated flexible low-voltage conductor having two end portions each electrically connected to a pair of pole pliers and a second electrically insulated flexible low-voltage conductor having two end portions each electrically connected to an insulated pair of pole pliers.    To prevent the occurrence of high peak voltages which may affect vehicle electronics during a jumper operation between a powering storage battery of the one vehicle and a discharged storage battery of another vehicle, there is provided at least one electrical connection between the first low-voltage conductor and the second low-voltage conductor. The electrical connection has at least one voltage-dependent resistor exhibiting a forward voltage in excess of the operating voltage of conventional starting batteries for automotive vehicles. The voltage-dependent resistor may be accommodated within a housing.    (15pp)    (DE3722286-C)      The jump start auxiliary cable set has a first electrically insulated flexible low voltage lead, not interrupted by a switch. Both end sections are connected with a first electrically insulated pole tong, with a second electrically insulated flexible low voltage lead, not interrupted by a switch. Both end sections are connected respectively with a second electrically insulated pole tong. The pole tongs are connected to be electrically conducting. At least one electrically conducting connection (20) with at least one voltage dependent resistance (30) is provided, the transmission voltage of which lies above the operation voltage of conventional starter batteries for motor vehicles. The connection (20) is arranged between the first low voltage lead (10) and the second low voltage lead (11) and/or between their first pole tongs (12,14) and their second pole tongs (13,15).    ADVANTAGE -   Simple and universal and can be used on different types of motor vehicle. Reliably prevents occurrence of high inductive peak voltages and does not adversely affect electronic components on vehicle.    (12pp)