for once and all: SPECIAL HANDLING and SPECIAL MARKING of packages sent by Air Transport is ONLY REQUIRED (by International Agreement) WHEN THE TOTAL AMOUNT OF STORED ENERGY EXCEEDS 100 WH.
"WH" means Watt-Hour. the shippers form specifies this value is computed using the total Ampere-hours times Battery Voltage contained within a package. if the total is 100WH or more, then a specific sticker is to be placed on the outside of the package and certain carrier procedures are to be followed.
100 WH = 0.45 Ah * 3.7V * 60 .. it would take 61 individual 450mAh 3.7V batteries IN ONE PACKAGE to exceed 100 WH.
yes, i am a bit irritated by an electronics vendor who would not include one lithium "coin battery" in the package for their product because of "international air transport restrictions"!
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kb3cs