It depends on the rated energy value. You can carry lithium batteries with a rated energy value of no more than 100Wh (watt-hour) on an airplane, and lithium batteries with a rated energy value of more than 100Wh but no more than 160Wh can be carried with the consent of the airline.
1, lithium batteries on board carry regulations
Passengers for personal use containing lithium batteries in portable electronic devices (cameras, cell phones, laptop computers, portable video cameras, etc.) can be carried on board as hand luggage, and lithium batteries rated energy value shall not exceed 100Wh (watt hours). Those exceeding 100Wh but not exceeding 160Wh can be loaded on the equipment in the delivery baggage or hand baggage with the approval of the airline. Lithium batteries exceeding 160Wh are strictly prohibited.
Spare batteries for portable electronic devices must be individually protected against short-circuiting (by placing them in their original retail packaging or otherwise insulating the electrodes, e.g., by taping the exposed electrodes, or by placing each battery in a separate plastic bag or protective case) and may be carried in hand baggage only. Only two spare lithium batteries of 100-160Wh approved by the airline can be carried.
Wheelchairs or other similar mobility devices powered by lithium batteries and portable medical electronic devices containing lithium batteries carried by passengers for medical purposes must be carried in accordance with the relevant regulations and requirements and approved by the airline. Passengers may consult with the airline in advance for assistance.
2. Regulations on carrying rechargeable batteries on board
(1) Rechargeable batteries must be carried by passengers for personal use.
(2) Chargers can only be carried in hand luggage or carry-on baggage, and are strictly prohibited in checked baggage.
(3) The rated energy of rechargeable batteries does not exceed 100Wh and does not require the approval of the airline; the rated energy of rechargeable batteries exceeding 100Wh but not exceeding 160Wh can be carried with the approval of the airline; however, no more than two rechargeable batteries are allowed to be carried by each passenger.
(4) It is strictly prohibited to carry rechargeable batteries with a rated energy of more than 160Wh; it is strictly prohibited to carry rechargeable batteries whose rated energy is not labeled and whose rated energy cannot be calculated from other parameters on the label.
(5) It is not permitted to use the rechargeable battery to charge electronic devices during the flight. For rechargeable batteries with an activation switch, the rechargeable batteries shall be turned off at all times during the flight.
Expanded Information
"Items Prohibited for Passengers to Carry Along or Check-in"
(1) Firearms, military or police armaments and devices (including major parts), including:
1. Military guns, official guns: pistols, rifles, submachine guns, machine guns, riot guns, etc.
2, civilian guns: air guns, shotguns, sports guns, anesthesia injection guns, hairpin guns and so on.
3, other guns: sample guns, prop guns and so on.
4, ordnance, police equipment: truncheons, military or police daggers, bayonets and so on.
5, nationally prohibited firearms, armaments: steel ball guns, tear gas guns, stun guns, tasers, defenses, etc.
6, imitations of the above items.
(2) Explosives category, including:
1. Ammunition: bombs, grenades, flares, incendiary bombs, smoke bombs, flare bombs, tear gas bombs, gas bombs and bullets (blanks, combat bombs, inspection bombs, coaching bombs), etc.
2, blasting equipment: explosives, detonators, fuses, detonating cords, non-electric detonation system, blasting agents, etc..
3, pyrotechnic products: salvos, fireworks, firecrackers and so on.
4, imitations of the above items.
(3) Controlled knives: knives listed in the Interim Provisions on the Control of Some Knives issued and implemented by the Ministry of Public Security with the approval of the State Council in 1983, including daggers and three-pronged knives (including three-pronged scrapers for machining).
Knives with self-locking devices and single-edged knives, double-edged knives that resemble daggers but are longer than daggers, as well as other similar single-edged, double-edged and three-pronged sharp knives. Tibetan knives, belt knives, boot knives, etc., which ethnic minorities need to wear and use due to their living habits, are controlled knives and are only allowed to be sold and used in national autonomous areas.
(d) flammable and explosive substances, including: hydrogen, oxygen, butane and other bottled compressed gases, liquefied gases; yellow phosphorus, white phosphorus, nitrocellulose fiber (including film), greaseproof paper and its products, such as spontaneous combustion of goods; metal potassium, sodium, lithium, calcium carbide (calcium carbide), magnesium and aluminum powder, such as combustion in contact with water.
Gasoline, kerosene, diesel fuel, benzene, ethanol (alcohol), paint, thinner, rosin oil and other flammable liquids; flash powder, solid alcohol, celluloid and other flammable solids; sodium peroxide, potassium peroxide, lead peroxide, peracetic acid and other inorganic and organic oxidizers.
(E) poisonous goods: including cyanide, highly toxic pesticides and other highly toxic substances.
(F) corrosive substances: including sulfuric acid, hydrochloric acid, nitric acid, liquid batteries, sodium hydroxide, potassium hydroxide and so on.
(vii) radioactive substances: radioactive isotopes and other radioactive substances.
(viii) other items that endanger flight safety, such as strong magnetized substances that may interfere with the normal operation of various instruments on the aircraft, and items with strong irritating odors.
(ix) Other articles prohibited from being carried or transported as stipulated by national laws and regulations.
Civil Aviation Administration of China (CAAC)-Security Inspection