Laptops can be carried on the plane, but the rated energy value of the laptop must not exceed 100 Wh (watt hours).
If the rated energy Wh (watt hours) is not directly marked on the lithium battery and power bank, the rated energy of the lithium battery and power bank can be converted as follows:
If known, the rated voltage (V) and rated capacity (Ah) of lithium batteries and external batteries can be calculated to obtain the rated energy value:
Wh= V x Ah
Nominal The nominal voltage and capacity are usually indicated on lithium batteries and external batteries.
If the lithium battery or power bank is only marked in milliamp-hours (mAh), you can divide the value by 1000 to get the amp-hour (Ah).
For example: the nominal voltage of the lithium battery et of the power bank is 3.7V, the rated capacity is 760mAh, and its rated energy is:
760mAh ÷ 1000 = 0.76Ah.
3.7 V × 0.76 Ah = 2.9 Wh
Detailed information
Battery transport regulations lithium
Passengers are intended for personal use. Portable electronic devices containing lithium batteries (cameras, mobile phones, laptops, camcorders, etc.) can be carried on board as carry-on baggage, and the rated energy value of the lithium battery must not exceed 100 Wh (watt hours). ) .
Devices exceeding 100 Wh but not exceeding 160 Wh may be installed in checked baggage or carry-on baggage with airline approval. Lithium batteries exceeding 160Wh are strictly prohibited.
Passengers carrying wheelchairs powered by lithium batteriesithium or other similar means of transportation and portable medical electronic devices containing lithium batteries carried by passengers for medical purposes must transport them in accordance with applicable regulations and requirements and pass them through the airline. approve. Passengers can consult the airline in advance for assistance.
Civil Aviation Administration-Air Travel Guide-Security Check
How to convert battery capacity mAh and electric energy kWh?
You can take it on the plane.
According to the requirements of the Civil Aviation Administration, the rated energy of the external battery does not exceed 100 Wh, and it can be taken directly into the aircraft without the approval of the company Aerial.
According to the rated energy formula of lithium batteries and power banks, the rated voltage of the bankpower supply is 3.6 V, the rated capacity is 20,000 mAh, and its rated energy is:
20,000 mAh ÷ 1,000 = 20 Ah, 3.6 V × 20 Ah = 72 Wh.
All 20,000 mAh external batteries can be taken on board the aircraft.
Detailed information
Notes on carrying baggage by plane:
When taking a domestic flight: the total weight of your baggage- on baggage should not exceed 5 kg, the volume of each item should not exceed 20×40×55 cm. If the item exceeds the specified number, weight or volume limit, the airline will require the baggage to be checked.
When taking an international flight: Under normal circumstances, the total weight of hand baggage should not exceed 7 kilograms and the volume of each piece of baggage should not exceed 20×40×55 cm (the sum of the three sides must not exceed 115 cm). Passengers traveling on routes betweens United States and Canada are only allowed to carry one carry-on bag.
Civil Aviation Administration of China - Safety Inspection
The external battery has a rated energy of 18.5 Wh/3.7 V and a power nominal 11.1 Wh. Approximately how many milliamps does the external battery have?
Battery capacity * rated voltage is energy.
For example: your battery capacity is 2000 mAh. Generally, the nominal voltage of the battery is calculated as 3.7 V, then your power is 2000 mAh*3.7 V = 7.4 Wh = 0.0074 kWh.
The unit of electricity is the Coulomb. The symbol Q represents the amount of charge. It is related to current and turn-on time using the formula Q=It. The unit of I is the ampere or ampere. and the time unit milliampere mA. It is the symbol for time h, so we have the unit mAh, W=Pt W represents power, t represents time, weso we have the kWh. A formula to work is W=UIt=UQ.
Detailed information:
Remarks
1Wh=0.001 kWh 1 watt hour = 0.001 kilowatt hour
1Wh/1V=1Ah=1000mAh
1000mAh*1V=1Wh
They are not related, they are not the same unit , kWh is the unit of energy, mAh is the unit of energy divided by voltage, q=it, where q is the unit of electricity, which should be Coulomb (c) i is of course the current , t is time, and now our unit mAh is the product of time and current, and kWh is the product of time, current and voltage.
5000 mAh.
The calculation method is as follows:
The formula for calculating the rated energy of the external battery is: Wh= V x Ah, Ah=Wh/V.
We know that the rated energy WH of the power bank is 18.5 Wh and the rated voltage V is 3.7 V.
So AH=18 .5Wh/3.7V=5AH=5000mAH.
Detailed informationillés
The mAh is not a unit of energy. It must be multiplied by the current voltage to get the actual energy. Generally, batteries are 1S single cells. When the standard voltage is the same, it is possible to use mAh to compare the capacity. However, in electric models, motorcycles, etc., when multiple cells are connected in series and grouped into a single battery, the light viewing mAh cannot accurately compare the capacity.
mAh is not a standard unit, but this unit can be easily used for measurement and calculation. For example, a 900 mAh battery can provide 300 mA constant current power for 3 hours.
Civil Aviation Administration-Safety Inspection-How to determine the energy rating of lithium batteries and power banks