Yes, that is not a problem. The nominal energy of the battery permanently installed in trackle is 750 mWh, meaning less than one watt-hour. And it is a battery, not a rechargeable battery. That's why trackle can be carried in hand luggage as well as checked luggage. If you are unsure, consult with the airport using the values listed here. As it can get quite cold in the cargo hold, we recommend taking the sensor with you in your hand luggage.