The conductive properties of butadiene polymer (BR) and styrene-butadiene polymer (SBR) with sodium chlorate (VII) can be used at industrial scale as miniature batteries. Polymer material modified with sodium chlorate (V-H) was used to produce sodium polybutadiene and poly(styrene-butadiene) batteries. The conductivity of such polymer composites for temperatures ranging 243-313 K is at a similar level and amounts to 10(-4) S cm(-1) for butadiene polymer and to 10(-3) S cm(-1) for styrene-butadiene polymer at 100 kHz. The conductive battery made of butadiene polymer shows a open circuit voltage of 0.9 V with a short-circuit current of 40 mA, whereas that made of styrene-butadiene polymer shows a open circuit voltage of 1.2 V with a short-circuit current of 38 mA. The lightness, commonly found material (sodium), and environment-fiiendly energy are main advantages of sodium polybutadiene and poly(styrene-butadiene) batteries. (c) 2007 Elsevier B.V. All rights reserved.