Lithium battery restrictions on airlines

Restrictions on carrying lithium batteries on airlines include12345:Lithium-ion batteries (laptops, power banks) are allowed but limited to 100 watt hours per battery.Up to two larger 101-160-watt-hour batteries are allowed with airline approval.Lithium metal (non-rechargeable) batteries are permitted up to 2 grams of lithium per battery.Spare (uninstalled) lithium batteries must be carried in carry-on baggage.Devices containing lithium batteries should be carried in carry-on baggage. [pdf]
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Can lithium ion batteries be in checked baggage

Spare (uninstalled) lithium metal batteries and lithium ion batteries are prohibited in checked baggage123. They must be carried with the passenger in carry-on baggage12. This is because fires that involve lithium batteries are accompanied by a great deal of heat, and lithium batteries generally store lots of energy3. [pdf]
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Icelandair lithium batteries

Passengers are requested to pack lithium batteries in their carry-on baggage, but they are not strictly forbidden in checked baggage as long as the batteries are. . It is forbidden to carry on board an aircraft any damaged, defective or recalled lithium batteries or devices. If a damaged, defective or recalled battery or. [pdf]
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