If you check your luggage by air, you can't If you take a small suitcase instead of a backpack, you can. Mobile phone, charging treasure, etc. You should carry it with you. It is best to put it in a backpack, pocket or small suitcase that is easy to take out. Take it out during security check and put it in later.

According to ICAO's Technical Rules for the Safety of Air Transport of Dangerous Goods (version 20 1 1-20 12), portable electronic equipment (watches, calculators, cameras, mobile phones, notebook computers, video cameras, etc.). ) contains lithium or lithium-ion batteries for the personal use of passengers or crew members, and should be taken on board as hand luggage.

Moreover, the lithium content of lithium metal battery shall not exceed 2g, and the rated energy value of lithium ion battery shall not exceed 100 Wh (watt-hour). Those exceeding 100 Wh but not exceeding 160 Wh can be installed on the equipment in luggage or hand luggage with the approval of airlines, and lithium batteries exceeding 160 Wh are strictly prohibited.

Extended data:

The following items are not suitable for transportation because of the following reasons: fragile or perishable items, lithium batteries and other items are dangerous and unsafe, or because of their weight, size, shape or nature, or considering factors including but not limited to aircraft types.

The spare batteries of portable electronic equipment must be separately short-circuited (put in the original retail packaging or insulate the electrodes in other ways, such as sticking adhesive tape on the exposed electrodes, or putting each battery in a separate plastic bag or protective box), and can only be carried in hand luggage. Only two spare lithium batteries of 100- 160Wh approved by airlines can be carried.

References:

General rules for checked baggage-China International Airlines official website