Lithium battery (lithium-thionyl or LiSOCl2) brand Voltec. The "M" variant has a lower capacity, but it lends itself better to applications with higher currents, compared to the standard ER34615...

Metal iodide light bulb for lighting commercial spaces, interiors, arcades, buildings, monuments, museums, exhibition halls, public and pedestrian spaces, parks and gardens with a very long lifespan...