Charging treasure generally has two kinds of batteries:

1. Lithium-ion battery cell, liquid, packed with steel ring, may cause explosion in case of short circuit.

2. li-polymer battery, the electrolyte is in gel state, which can be packed in aluminum-plastic soft bags, and will expand at most without explosion.

In addition, when you buy it, you can see if the charging treasure has UN38.3 international air transport safety standards. You should know that UN38.3 certification needs to pass many experiments, such as high simulation test, thermal test, vibration test, impact test, external short circuit test, collision test and so on.