By Allison Lampert MONTREAL (Reuters) - The U.N. aviation agency on Monday prohibited shipments of lithium-ion batteries as cargo on passenger aircraft, following concerns by pilots and plane makers that they are a fire risk. Lithium metal batteries, which are used in watches, have already been banned on passenger planes globally. Lithium metal batteries, used in watches, are not rechargable while lithium-ion batteries, used in cell phones and laptops, can be recharged. ...

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