Thinking about getting one of those ‘smart bags’ for your holiday travel? Read this first.

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American Airlines jets taxi at Miami International Airport. The airline is placing restrictions on “smart luggage” because of concerns that the lithium-ion batteries that power some bags could pose a fire risk. (Lynne Sladky/AP) Three U.S. airlines have announced new restrictions on “smart bags” — a new breed of luggage that includes internal tracking devices…