Lithium batteries, which power everyday devices, can catch fire if damaged or if battery terminals are short-circuited. And it will also be required to be strictly checked when flying. So, can lithium batteries be carried on the plane? The answer is yes.
However, he US Federal Aviation Administration has made regulations on the carriage of lithium batteries in 2020. It is stipulated that equipment containing lithium-ion batteries should be carried with you, and some lithium-ion batteries cannot be checked.
Devices containing lithium metal batteries or lithium ion batteries, including – but not limited to – smartphones, tablets, cameras and laptops, should be kept in carry-on baggage.
If these devices are packed in checked baggage, they should be turned completely off, protected from accidental activation and packed so they are protected from damage. Spare (uninstalled) lithium metal batteries and lithium ion batteries, electronic cigarettes and vaping devices are prohibited in checked baggage.
In addition, only 100 watt-hour lithium batteries, or batteries containing less than 2 grams of lithium, can be carried with you. 100Wh-160Wh batteries are accepted as checked baggage. 160Wh batteries are not allowed.
Why Lithium Batteries Are Restricted in Air Transport ?
If you know that 100 watt-hours is everything you carry on your body that contains lithium-ion batteries, you might be wondering: why is there such a strict limit on lithium-ion batteries in air transport?
Well, of course airlines have some reasons to do that.
First, lithium batteries present two chemical and electric shock risks
Second, they run the risk of thermal runaway and fire.
Third, the suppressed flame heat energy of lithium batteries may cause other batteries to burn and explode like dominoes.
Fourth, fire extinguishers cannot immediately extinguish a lithium metal or lithium ion battery fire, and a small lithium battery fire will consume all the fire extinguishers in the cabin.
Fifth, fighting fires in the cabin will also lead to panic, emergency landings, breathing difficulties and the spread of fire extinguishing agents due to smoking.
Finally, some lithium batteries (CR123A) used in cameras and flashlights may cause burning or explosion when the plane is descending, especially counterfeit ones are more obvious.
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How to identify the energy of lithium battery?
Since airplanes have requirements for the watt-hour of carrying lithium-ion batteries, how do we calculate the energy of lithium-ion batteries in our hands?
What is "watt-hour" means, and how many milliamp hours is one watt-hour?
Well, mAh multiplied by battery voltage and divided by 1000 is watt-hours. Many people have come into contact with "mAh" in mobile phone promotion, which is the unit of power.
For example, "This phone is equipped with a 2000mAh battery". Milliampere hour is the unit of electricity, you can understand it as the total number of electrons (discharge current at the intensity of 2000 milliamps, after 1 hour of release, count how many electrons have flowed in total).
Why does the Aviation Administration not use the unit of electricity as a limit, but must use the unit of "watt-hour"?
Considering that the battery will explode, the strength of the explosion effect is directly related to the amount of energy, so it is necessary to specify an energy unit as a limit.
For example, we can find a battery with a capacity of 1000 mAh. Although the capacity is very small, if the voltage of the battery is as high as 200V, the energy is 200 Wh. Trip
How do you know the battery capacity of notebook digital cameras and other products, and how big is it?
Because the battery voltages of these products are different, all of them are clearly marked with the energy unit "Wh". Generally, the low-end notebook battery is about 30-40 Wh, the mid-range is 60 Wh, and the high-end is between 80-100 Wh. Digital cameras are between 6-15 watt hours.
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