2. However, if the capacity of the lithium battery exceeds 160WH, _ can neither be carried nor checked, and the electric toothbrush _ dry battery can be checked. Portable electronic equipment (watches, calculators, cameras, mobile phones, notebook computers, video cameras, etc. ) Lithium-containing or lithium-ion batteries for personal use of passengers or crew members should be carried on board as hand luggage. The lithium content of lithium metal batteries should not exceed 2g, and the rated energy value of lithium-ion batteries should not exceed 100WH (watt hour). Those exceeding 100WH but not exceeding 160WH may be installed on the equipment in checked baggage or hand luggage with the approval of the airline. It is forbidden to use lithium batteries above 160WH. Only two spare lithium batteries of 100- 160WH approved by airlines can be carried. Passengers and crew members carrying lithium-ion battery-driven wheelchairs or other similar means of transport, as well as portable medical electronic equipment containing lithium metal or lithium-ion battery units or batteries for medical purposes carried by passengers, must be carried in accordance with the transportation and packaging requirements of the Technical Rules and approved by airlines.