You need a special triangler screwdriver to change batteries on Brio trains. : r/assholedesign
BRIO World Battery-Operated Steaming Train
Brio Battery-Operated Steaming Train
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BRIO World Battery-Operated Steaming Train
Brio Battery-Operated Steaming Train
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BRIO Metro Engine Railway Set Owner's Manual
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How to change battery on Brio Train (locomotive) - YouTube
BRIO World Rechargeable Battery Engine Train for Kids Age 3 Years Up & World Mighty Red