This is a battery holder for 4x AA batteries. This battery holder has an on / off switch. With the sturdy housing, a battery can be easily clicked off and on without having to glue the battery to the project. https://elecena.pl/product/27739056/opencircuit-4x-aa-battery-holder-with-switch 2025-01-22 https://elecena.pl/product/27739056/opencircuit-4x-aa-battery-holder-with-switch 2025-07-31 https://elecena.pl/product/27739056/opencircuit-4x-aa-battery-holder-with-switch 2025-08-01 https://elecena.pl/product/27739056/opencircuit-4x-aa-battery-holder-with-switch 2026-02-20 https://elecena.pl/product/27739056/opencircuit-4x-aa-battery-holder-with-switch 2026-04-11 https://elecena.pl/product/27739056/opencircuit-4x-aa-battery-holder-with-switch 2026-04-25