This mounted battery holder is designed for use as a power supply for the PSU Base Electricity Teaching Modules. The module has 4x 1.5V C cell holders mounted on a tough acrylic base. 5x 4mm sockets are distributed to allow tapped outputs at 0, 1.5, 3, 4.5 or 6V. The base has been formed to raise the sockets clear of the work surface below, allowing 4mm plug leads to be fully inserted. * Batteries not included https://elecena.pl/product/27207570/psu-base-m4psub-electricity-teaching-modules-module-4 2024-11-10 https://elecena.pl/product/27207570/psu-base-m4psub-electricity-teaching-modules-module-4 2026-05-20 https://elecena.pl/product/27207570/psu-base-m4psub-electricity-teaching-modules-module-4 2026-07-05 https://elecena.pl/product/27207570/psu-base-m4psub-electricity-teaching-modules-module-4 2026-09-14