Abstract One of the approaches to improving the ionic conductivity and the mechanical strength of a solid polymer electrolyte is to use polymers in modified forms, such as polymer blends, copolymers and cross-linked polymers. In this study, a new polymer electrolyte based on the acrylonitrile-butadiene-styrene (ABS) copolymer has been prepared. The ionic conductivity, electrochemical stability and interfacial characteristics of the polymer electrolyte in contact with a lithium electrode have been investigated. The temperature dependence of the conductivity below 20C can be described by the Arrhenius equation, and above 20C by the VTF equation. Lithium passivation appeared to have taken place in the system. The conductivity and electrochemical characteristics of the system are somewhat similar to those of PAN-based polymer electrolytes.