You can’t replace the battery in Lego’s Smart Bricks — and many of its sensors aren’t active yet

The first Lego Smart Brick sets, based on Star Wars, aren’t quite what my kids and I hoped, and I suspect much of that’s down ...
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LEGO Smart Bricks Explained: How NFC, Bluetooth Mesh and Sensors Transform Classic Builds

On March 1st, 2026, The Lego Group is launching Smart Bricks, tiny computers hidden inside classic 2x4 bricks. These interact with NFC smart tags in new tiles and minifigures, link through Bluetooth, ...
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Lego’s smart bricks feature non-replaceable batteries and limited sensor availability

Future releases will enable access to the sensors.

Lego Smart Brick review: My kids are not impressed

We review the first Lego Smart Brick sets, including the $70 Darth Vader’s TIE Fighter, the $90 Luke’s Red Five X-Wing, and the $160 Throne Room Duel.