Control and signal device for batteries

摘要

A control and signal device (10) for batteries, especially for starter batteries of motor-vehicles comprises a shaped body (12) from transparent material with a refraction index different from the one of the electrolyte, constituted in the upper part of a support or plug (14) that can be engaged in the container and/or the lid of the battery, and integrating an emitter(16) of light ray beams (42, 44), and a receiver (18) of said rays, two or more electrical terminals (32) being connected to said plug (14).