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Light Kit for LEGO - Double Red LED LEGO Studs with 2x4 Battery Brick – Brick Loot
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1x Lego Elektrik Licht Stein rot 2x3x1 ohne Batterie geprüft 54930c01
How to Change the Battery on a LEGO Light Brick - YouTube
Amazon.com: Lego Parts: Electric, Light Brick 2 x 3 x 1 1/3 with Trans-Clear Top and Yellow LED Light : Toys & Games
1960s LEGO battery box and light brick | Quest for Bricks